Shawn has a balance of $1200 on a credit card with an apr of 18.7%, compounded monthly. about how much will he save in interest over the course of a year if he transfers his balance to a credit card with an apr of 12.5%, compounded monthly? (assume that shawn will make no payments or new purchases during the year, and ignore any possible late payment fees.) a. $87.33 b. $181.46 c. $85.77 d. $117.85