The spot price of oil is $74 per barrel and the 3-month cost of storing a barrel of oil is $0.68 payable at the end of each quarter. The risk-free interest rate is 2.5% per annum, continuously compounded. What is an upper bound for the six-month futures price of oil? Calculate answer to 2 decimal places. Note, final answer has to be correct to within +/- 0.03, and do not "over round" intermediate steps.