The owner of a number of gas stations is considering installing coffee machines in his gas stations. It will cost $280,000 to install the coffee machines, and they are expected to boost cash flows by $130,000 per year for their five-year working life. What must the cost of capital be if this investment has a profitability index of 12 O A. 10.37% B. 12.96% O c. 5.18% OD. 2.59% Click to select your answer. ? )