.

Table:
contractual obligations | 2015 | 2016 | 2017 | 2018 | 2019 | thereafter | total
long-term obligations excluding capital leases | 888810 | 753045 | 700608 | 1787451 | 3159286 | 7188751 | 14477951
cash interest expense | 550000 | 517000 | 485000 | 399000 | 315000 | 654000 | 2920000
capital lease payments ( including interest ) | 15589 | 14049 | 12905 | 12456 | 10760 | 173313 | 239072
total debt service obligations | 1454399 | 1284094 | 1198513 | 2198907 | 3485046 | 8016064 | 17637023
operating lease payments ( 11 ) | 574438 | 553864 | 538405 | 519034 | 502847 | 4214600 | 6903188
other non-current liabilities ( 12 ) ( 13 ) | 11082 | 20480 | 5705 | 13911 | 4186 | 1860071 | 1915435
total | $ 2039919 | $ 1858438 | $ 1742623 | $ 2731852 | $ 3992079 | $ 14090735 | $ 26455646
( 1 ) represents anticipated repayment date ; final legal maturity date is march 15 , 2043 .
( 2 ) represents anticipated repayment date ; final legal maturity date is march 15 , 2048 .
( 3 ) in connection with our acquisition of mipt on october 1 , 2013 , we assumed approximately $ 1.49 billion aggregate principal amount of secured notes , $ 250.0 million of which we repaid in august 2014 .
the gtp notes have anticipated repayment dates beginning june 15 , 2016 .
( 4 ) assumed in connection with our acquisition of br towers and denominated in brl .
the br towers debenture amortizes through october 2023 .
the br towers credit facility amortizes through january 15 , ( 5 ) assumed by us in connection with the unison acquisition , and have anticipated repayment dates of april 15 , 2017 , april 15 , 2020 and april 15 , 2020 , respectively , and a final maturity date of april 15 , 2040 .
( 6 ) denominated in mxn .
( 7 ) denominated in zar and amortizes through march 31 , 2020 .
( 8 ) denominated in cop and amortizes through april 24 , 2021 .
( 9 ) reflects balances owed to our joint venture partners in ghana and uganda .
the ghana loan is denominated in ghs and the uganda loan is denominated in usd .
( 10 ) on february 11 , 2015 , we redeemed all of the outstanding 4.625% ( 4.625 % ) notes in accordance with the terms thereof .
( 11 ) includes payments under non-cancellable initial terms , as well as payments for certain renewal periods at our option , which we expect to renew because failure to renew could result in a loss of the applicable communications sites and related revenues from tenant leases .
( 12 ) primarily represents our asset retirement obligations and excludes certain other non-current liabilities included in our consolidated balance sheet , primarily our straight-line rent liability for which cash payments are included in operating lease payments and unearned revenue that is not payable in cash .
( 13 ) excludes $ 26.6 million of liabilities for unrecognized tax positions and $ 24.9 million of accrued income tax related interest and penalties included in our consolidated balance sheet as we are uncertain as to when and if the amounts may be settled .
settlement of such amounts could require the use of cash flows generated from operations .
we expect the unrecognized tax benefits to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this timeframe .
however , based on the status of these items and the amount of uncertainty associated with the outcome and timing of audit settlements , we are currently unable to estimate the impact of the amount of such changes , if any , to previously recorded uncertain tax positions .
off-balance sheet arrangements .
we have no material off-balance sheet arrangements as defined in item 303 ( a ) ( 4 ) ( ii ) of sec regulation s-k .
interest rate swap agreements .
we have entered into interest rate swap agreements to manage our exposure to variability in interest rates on debt in colombia and south africa .
all of our interest rate swap agreements have been designated as cash flow hedges and have an aggregate notional amount of $ 79.9 million , interest rates ranging from 5.74% ( 5.74 % ) to 7.83% ( 7.83 % ) and expiration dates through april 2021 .
in february 2014 , we repaid the costa rica loan and subsequently terminated the associated interest rate swap agreements .
additionally , in connection with entering into the colombian credit facility in october 2014 , we terminated our pre-existing interest rate .

Question: assuming a midpoint interest rate in the range , what would be the annual interest expense on interest rate swap agreements based on the notional amounts , in millions?
Answer: 5.4
Calculation: add(5.74, 7.83), divide(#0, const_2), divide(#1, const_100), multiply(#2, 79.9)