Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| Unnamed: 0                       | 2014             | 2013             | 2012             |
|:---------------------------------|:-----------------|:-----------------|:-----------------|
| expected term ( in years ) ( 1 ) | 4.80             | 6.08             | 6.02             |
| risk-free rate of return ( 2 )   | 1.3% ( 1.3 % )   | 0.8% ( 0.8 % )   | 1.2% ( 1.2 % )   |
| expected volatility ( 3 )        | 25.2% ( 25.2 % ) | 29.3% ( 29.3 % ) | 34.9% ( 34.9 % ) |
| expected dividend yield ( 4 )    | 0.8% ( 0.8 % )   | 0.9% ( 0.9 % )   | 0.9% ( 0.9 % )   |
| fair value per option granted    | $ 44.11          | $ 39.03          | $ 29.65          |

Question:
what is the total share-based compensation cost in the last three years?


pre_text: share-based compensation cost is recorded net of estimated forfeitures on a straight-line basis for awards with service conditions only , and on a graded-vesting basis for awards with service , performance and market conditions .
the company 2019s estimated forfeiture rate is based on an evaluation of historical , actual and trended forfeiture data .
for fiscal 2014 , 2013 , and 2012 , the company recorded share-based compensation cost of $ 172 million , $ 179 million and $ 147 million , respectively , in personnel on its consolidated statements of operations .
the amount of capitalized share-based compensation cost was immaterial during fiscal 2014 , 2013 and 2012 .
options options issued under the eip expire 10 years from the date of grant and vest ratably over 3 years from the date of grant , subject to earlier vesting in full under certain conditions .
during fiscal 2014 , 2013 and 2012 , the fair value of each stock option was estimated on the date of grant using a black-scholes option pricing model with the following weighted-average assumptions: .
post_text: ( 1 ) beginning in fiscal 2014 , assumption is based on the company 2019s historical option exercises and those of a set of peer companies that management believes is generally comparable to visa .
the company 2019s data is weighted based on the number of years between the measurement date and visa 2019s initial public offering as a percentage of the options 2019 contractual term .
the relative weighting placed on visa 2019s data and peer data in fiscal 2014 was approximately 58% ( 58 % ) and 42% ( 42 % ) , respectively .
in fiscal 2013 and 2012 , assumption was fully based on peer companies 2019 data .
( 2 ) based upon the zero coupon u.s .
treasury bond rate over the expected term of the awards .
( 3 ) based on the company 2019s implied and historical volatility .
in fiscal 2013 and 2012 , historical volatility was a blend of visa 2019s historical volatility and those of comparable peer companies .
the relative weighting between visa historical volatility and the historical volatility of the peer companies was based on the percentage of years visa stock price information is available since its initial public offering compared to the expected term .
the expected volatilities ranged from 22% ( 22 % ) to 26% ( 26 % ) in fiscal ( 4 ) based on the company 2019s annual dividend rate on the date of grant. .
label: 498
qa: answer: 498
ann_table_rows: 2
steps: op: add1-1
arg1: 172
arg2: 179
res: 351
op: add1-2
arg1: #0
arg2: 147
res: 498
program: add(172, 179), add(#0, 147)
gold_inds: table_2: the risk-free rate of return ( 2 ) of 2014 is 1.3% ( 1.3 % ) ; the risk-free rate of return ( 2 ) of 2013 is 0.8% ( 0.8 % ) ; the risk-free rate of return ( 2 ) of 2012 is 1.2% ( 1.2 % ) ;
text_2: for fiscal 2014 , 2013 , and 2012 , the company recorded share-based compensation cost of $ 172 million , $ 179 million and $ 147 million , respectively , in personnel on its consolidated statements of operations .
exe_ans: 498
tfidftopn: text_3: the amount of capitalized share-based compensation cost was immaterial during fiscal 2014 , 2013 and 2012 .
program_re: add(add(172, 179), 147)
model_input: text_2
for fiscal 2014 , 2013 , and 2012 , the company recorded share-based compensation cost of $ 172 million , $ 179 million and $ 147 million , respectively , in personnel on its consolidated statements of operations .
table_3
the expected volatility ( 3 ) of 2014 is 25.2% ( 25.2 % ) ; the expected volatility ( 3 ) of 2013 is 29.3% ( 29.3 % ) ; the expected volatility ( 3 ) of 2012 is 34.9% ( 34.9 % ) ;
table_4
the expected dividend yield ( 4 ) of 2014 is 0.8% ( 0.8 % ) ; the expected dividend yield ( 4 ) of 2013 is 0.9% ( 0.9 % ) ; the expected dividend yield ( 4 ) of 2012 is 0.9% ( 0.9 % ) ;