CECONY 3.2.1.1 Restated Certificate of Incorporation of CECONY filed with the Department of State of the State of New York on December?31, 1984.
(Designated in the Annual Report on Form 10-K of CECONY for the year ended December?31, 1989 (File No.1-1217) as Exhibit 3 (a)) 3.2.1.2 The following certificates of amendment of Restated Certificate of Incorporation of CECONY filed with the Department of State of the State of New York, which are designated as follows:
## Table 0 ##
## Table 1 ##
3.2.2 By-laws of CECONY, effective May 18, 2015.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended March?31, 2015 (File No.1-1217) as Exhibit 3.2) 4.2.1 Participation Agreement, dated as of July 1, 1999, between New York State Energy Research and Development Authority (NYSERDA) and CECONY.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 1999 (File No.1-1217) as Exhibit 4.1) 4.2.2 Participation Agreement, dated as of November 1, 2010, between NYSERDA and CECONY.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2010 (File No.1-1217) as Exhibit 4.2.2) 4.2.3 Participation Agreement, dated as of November 1, 2001, between NYSERDA and CECONY.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2001 (File No.1-1217) as Exhibit 10.2.1) 4.2.4 Participation Agreement, dated as of January 1, 2004, between NYSERDA and CECONY.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No.1-1217) as Exhibit 4.2.6) 4.2.5 Participation Agreement, dated as of January 1, 2004, between NYSERDA and CECONY.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No.1-1217) as Exhibit 4.2.7) 4.2.6 Participation Agreement, dated as of November?1, 2004, between NYSERDA and CECONY.
(Designated in CECONY’s Current Report on Form 8-K, dated November?9, 2004 (File No.1-1217) as Exhibit 4.1) 4.2.7 Participation Agreement, dated as of May 1, 2005, between NYSERDA and CECONY.
(Designated in CECONY’s Current Report on Form 8-K, dated May 25, 2005 (File No.1-1217) as Exhibit 4.1) 4.2.8.1 Indenture of Trust, dated as of July 1, 1999 between NYSERDA and HSBC Bank USA, as trustee.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 1999 (File No.1-1217) as Exhibit 4.2) 4.2.8.2 Supplemental Indenture of Trust, dated as of July 1, 2001, to Indenture of Trust, dated July 1, 1999 between NYSERDA and HSBC Bank USA, as trustee.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2001 (File No.1-1217) as Exhibit 10.2.2) 4.2.9.1 Trust Indenture, dated as of November 1, 2010 between NYSERDA and The Bank of New York Mellon, as trustee.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2010 (File No.1-1217) as Exhibit 4.2.9) 4.2.9.2 First Supplemental Indenture dated November 2, 2012 to the Trust Indenture dated as of November 1, 2010.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2012 (File No.1-1217) as Exhibit 4.2.9.2) 4.2.10 Indenture of Trust, dated as of November?1, 2001, between NYSERDA and The Bank of New York, as trustee.
(Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended September?30, 2001 (File?No.
?1-1217) as Exhibit 10.2.2) 4.2.11 Indenture of Trust, dated as of January 1, 2004, between NYSERDA and The Bank of New York.
(Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No.1-1217) as Exhibit 4.2.12)
Gas Sales and Deliveries O&R generally recovers the cost of the gas that it buys and then sells to its full-service customers.
It does not make any margin or profit on the gas it sells.
O&R’s gas revenues are subject to a weather normalization clause.
O&R’s New York gas revenues (which have accounted for substantially all of O&R’s gas revenues) are subject to a revenue decoupling mechanism.
As a result, its gas delivery revenues are generally not affected by changes in delivery volumes from levels assumed when rates were approved.
O&R’s gas sales and deliveries for the last five years were:
## Table 2 ##
Year Ended December 31,
## Table 3 ##
For further discussion of the company’s gas operating revenues and its gas results, see “Results of Operations” in Item 7.
For additional segment information, see Note N to the financial statements in Item 8.
Gas Peak Demand The gas peak demand for firm sales customers in O&R’s service area occurs during the winter heating season.
The peak day demand during the winter 2016/2017 (through January 31, 2017) occurred on January 8, 2017 when the demand reached 173 MDt.
The 2016/2017 peak day demand included 83 MDt for O&R’s full-service customers and 90 MDt for customers participating in its gas retail choice program.
“Design weather” for the gas system is a standard to which the actual peak demand is adjusted for evaluation and planning purposes.
The company estimates that, under design weather conditions, the 2017/2018 service area peak day demand will be 222 MDt, including an estimated 107 MDt for its full-service customers and 115 MDt for its gas retail choice customers.
The forecasted peak day demand at design conditions does not include gas used by interruptible gas customers including electric generating stations.
The company forecasts an average annual growth of the gas peak demand over the next five years at design conditions to be approximately 0.2 percent in its service area.
Pike’s peak demand is reflected in the company’s service area peak demand amounts (see Note U to the financial statements in Item 8).
Clean Energy Businesses The Clean Energy Businesses’ results of operations for the year ended December 31, 2016 compared with the year ended December 31, 2015 is as follows:
## Table 4 ##
Operating revenues decreased $292 million in 2016 compared with 2015 due primarily to lower electric retail revenues.
Electric retail revenues decreased $389 million in 2016 as compared with 2015 due to the sale of the retail electric supply business (see Note U to the financial statements in Item 8).
Solar revenues increased $54 million in 2016 as compared with 2015 due primarily to an increase in solar electric production projects in operation.
Energy services revenues increased $41 million due to an increase in active projects.
Wholesale revenues increased $8 million in 2016 compared with 2015 due primarily to higher sales volumes.
Net mark-to-market values increased $6 million in 2016 as compared with 2015, of which $12 million in gains are reflected in purchased power expenses and $6 million in losses are reflected in revenues.
Purchased power expenses decreased $370 million in 2016 compared with 2015 due to the sale of the retail electric supply business ($373 million) (see Note U to the financial statements in Item 8) and changes in mark-to-market gains ($12 million).
Gas purchased for resale increased $6 million in 2016 compared with 2015 due primarily to higher sales volumes.
Other operations and maintenance expenses increased $30 million in 2016 compared with 2015 due primarily to an increase in energy services costs ($28 million) and other general operating expenses ($2 million).
Depreciation and amortization increased $20 million in 2016 compared with 2015 due primarily to an increase in renewable electric production projects in operation during 2016.
Taxes, other than income taxes increased $1 million in 2016 compared with 2015 due primarily to higher property taxes ($5 million), offset by lower gross receipt taxes ($4 million).
Gain on sale of retail electric supply business was $104 million in 2016 reflecting the sale of the retail electric supply business (see Note U to the financial statements in Item 8).
Other Income (Deductions) Other income (deductions) decreased $12 million in 2016 compared with 2015 due primarily to the impairment of goodwill ($15 million) (see Note K to the financial statements in Item 8), offset in part by income from solar electric production investments ($3 million).
Net Interest Expense Net interest expense increased $23 million in 2016 compared with 2015 due primarily to new debt issuances for renewable electric production projects.
Income Tax Expense Income taxes increased $31 million in 2016 compared with 2015 due primarily to higher income before income tax expense ($38 million), an increase to deferred state income taxes as a result of the sale of the retail electric supply business ($4 million) and an increase in valuation allowances against state net operating loss carryforwards ($3 million), offset in part by higher production tax credits ($10 million) and the reversal of uncertain tax positions ($4 million)
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (Continued) The following results drove changes in CCG operating income by approximately the amounts indicated:

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td colspan="3">Securities Exchange ActFile No. 1-1217</td></tr><tr><td>Date Filed With Department of State</td><td rowspan="5">Form 10-K 10-K 8-K 8-K</td><td rowspan="5">Date 12/31/1989 12/31/1989 4/24/1992 8/20/1992</td><td rowspan="5">Exhibit 3(b) 3(c) 4(d) 4(e)</td></tr><tr><td>5/16/1988</td></tr><tr><td>6/2/1989</td></tr><tr><td>4/28/1992</td></tr><tr><td>8/21/1992</td></tr><tr><td>2/18/1998</td><td>10-K</td><td>12/31/1997</td><td>3.1.2.3</td></tr></table>
<table><tr><td>3.2.2</td><td>By-laws of CECONY, effective May 18, 2015. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2015 (File No. 1-1217) as Exhibit 3.2)</td></tr><tr><td>4.2.1</td><td>Participation Agreement, dated as of July 1, 1999, between New York State Energy Research and Development Authority (NYSERDA) and CECONY. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 1999 (File No. 1-1217) as Exhibit 4.1)</td></tr><tr><td>4.2.2</td><td>Participation Agreement, dated as of November 1, 2010, between NYSERDA and CECONY. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2010 (File No. 1-1217) as Exhibit 4.2.2)</td></tr><tr><td>4.2.3</td><td>Participation Agreement, dated as of November 1, 2001, between NYSERDA and CECONY. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2001 (File No. 1-1217) as Exhibit 10.2.1)</td></tr><tr><td>4.2.4</td><td>Participation Agreement, dated as of January 1, 2004, between NYSERDA and CECONY. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No. 1-1217) as Exhibit 4.2.6)</td></tr><tr><td>4.2.5</td><td>Participation Agreement, dated as of January 1, 2004, between NYSERDA and CECONY. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No. 1-1217) as Exhibit 4.2.7)</td></tr><tr><td>4.2.6</td><td>Participation Agreement, dated as of November 1, 2004, between NYSERDA and CECONY. (Designated in CECONY’s Current Report on Form 8-K, dated November 9, 2004 (File No. 1-1217) as Exhibit 4.1)</td></tr><tr><td>4.2.7</td><td>Participation Agreement, dated as of May 1, 2005, between NYSERDA and CECONY. (Designated in CECONY’s Current Report on Form 8-K, dated May 25, 2005 (File No. 1-1217) as Exhibit 4.1)</td></tr><tr><td>4.2.8.1</td><td>Indenture of Trust, dated as of July 1, 1999 between NYSERDA and HSBC Bank USA, as trustee. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 1999 (File No. 1-1217) as Exhibit 4.2)</td></tr><tr><td>4.2.8.2</td><td>Supplemental Indenture of Trust, dated as of July 1, 2001, to Indenture of Trust, dated July 1, 1999 between NYSERDA and HSBC Bank USA, as trustee. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2001 (File No. 1-1217) as Exhibit 10.2.2)</td></tr><tr><td>4.2.9.1</td><td>Trust Indenture, dated as of November 1, 2010 between NYSERDA and The Bank of New York Mellon, as trustee. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2010 (File No. 1-1217) as Exhibit 4.2.9)</td></tr><tr><td>4.2.9.2</td><td>First Supplemental Indenture dated November 2, 2012 to the Trust Indenture dated as of November 1, 2010. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2012 (File No. 1-1217) as Exhibit 4.2.9.2)</td></tr><tr><td>4.2.10</td><td>Indenture of Trust, dated as of November 1, 2001, between NYSERDA and The Bank of New York, as trustee. (Designated in CECONY’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2001 (File No. 1-1217) as Exhibit 10.2.2)</td></tr><tr><td>4.2.11</td><td>Indenture of Trust, dated as of January 1, 2004, between NYSERDA and The Bank of New York. (Designated in CECONY’s Annual Report on Form 10-K for the year ended December 31, 2003 (File No. 1-1217) as Exhibit 4.2.12)</td></tr></table>
<table><tr><td></td><td colspan="5">Year Ended December 31,</td></tr><tr><td></td><td>2012</td><td>2013</td><td>2014</td><td>2015</td><td>2016</td></tr><tr><td>Gas Delivered(MDt)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Firm Sales</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Full service</td><td>7,539</td><td>8,808</td><td>9,529</td><td>9,348</td><td>9,723</td></tr><tr><td>Firm transportation</td><td>10,505</td><td>12,062</td><td>12,592</td><td>11,752</td><td>10,381</td></tr><tr><td>Total Firm Sales</td><td>18,044</td><td>20,870</td><td>22,121</td><td>21,100</td><td>20,104</td></tr><tr><td>Interruptible Sales</td><td>4,326</td><td>4,118</td><td>4,216</td><td>4,205</td><td>3,853</td></tr><tr><td>Total Gas Delivered to O&R Customers</td><td>22,370</td><td>24,988</td><td>26,337</td><td>25,305</td><td>23,957</td></tr><tr><td>Transportation of customer-owned gas</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales for resale</td><td>793</td><td>885</td><td>945</td><td>906</td><td>867</td></tr><tr><td>Sales to electric generating stations</td><td>15</td><td>19</td><td>70</td><td>25</td><td>18</td></tr><tr><td>Off-System Sales</td><td>—</td><td>—</td><td>3</td><td>62</td><td>16</td></tr><tr><td>Total Sales</td><td>23,178</td><td>25,892</td><td>27,355</td><td>26,298</td><td>24,858</td></tr></table>
<table><tr><td></td><td colspan="5">Year Ended December 31,</td></tr><tr><td></td><td>2012</td><td>2013</td><td>2014</td><td>2015</td><td>2016</td></tr><tr><td>Gas Delivered($ in millions)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Firm Sales</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Full service</td><td>$103</td><td>$115</td><td>$121</td><td>$91</td><td>$99</td></tr><tr><td>Firm transportation</td><td>76</td><td>77</td><td>75</td><td>68</td><td>70</td></tr><tr><td>Total Firm Sales</td><td>179</td><td>192</td><td>196</td><td>159</td><td>169</td></tr><tr><td>Interruptible Sales</td><td>4</td><td>3</td><td>2</td><td>3</td><td>3</td></tr><tr><td>Total Gas Delivered to O&R Customers</td><td>183</td><td>195</td><td>198</td><td>162</td><td>172</td></tr><tr><td>Transportation of customer-owned gas</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Sales to electric generating stations</td><td>—</td><td>—</td><td>1</td><td>—</td><td>—</td></tr><tr><td>Other operating revenues</td><td>20</td><td>10</td><td>13</td><td>20</td><td>12</td></tr><tr><td>Total Sales</td><td>$203</td><td>$205</td><td>$212</td><td>$182</td><td>$184</td></tr><tr><td>Average Revenue Per Dt Sold</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>$14.01</td><td>$13.31</td><td>$13.01</td><td>$10.11</td><td>$10.71</td></tr><tr><td>General</td><td>$11.99</td><td>$11.53</td><td>$11.30</td><td>$8.24</td><td>$8.17</td></tr></table>
<table><tr><td></td><td colspan="2">For the Years Ended December 31,</td><td></td></tr><tr><td>(Millions of Dollars)</td><td>2016</td><td>2015</td><td>Variation</td></tr><tr><td>Operating revenues</td><td>$1,091</td><td>$1,383</td><td>$-292</td></tr><tr><td>Purchased power</td><td>674</td><td>1,044</td><td>-370</td></tr><tr><td>Gas purchased for resale</td><td>112</td><td>106</td><td>6</td></tr><tr><td>Other operations and maintenance</td><td>164</td><td>134</td><td>30</td></tr><tr><td>Depreciation and amortization</td><td>42</td><td>22</td><td>20</td></tr><tr><td>Taxes, other than income taxes</td><td>20</td><td>19</td><td>1</td></tr><tr><td>Gain on sale of retail electric supply business</td><td>104</td><td>—</td><td>104</td></tr><tr><td>Operating income</td><td>$183</td><td>$58</td><td>$125</td></tr></table>

Question: What's the average of Purchased power of For the Years Ended December 31, 2015, and Interruptible Sales of Year Ended December 31, 2013 ?
Answer: 2581
Reasoning program: add(1044.0,4118.0), divide(#0,const_2)