Wendy Ellison needed to borrow $2,500 to pay her son's school tuition. She borrowed the money from her credit union at 8% ordinary simple interest (360-day year) and, repaid a total of $2,600 at the end of the loan period. Compute the length of the loan period. (To the nearest day.) a. 200 days b. 120 days c. 180 days d. 160 days