Explain how to solve this math problem: Alison qualified for a spot on the running team, so she went shopping for some athletic gear. She bought a tank top for $10, a pair of running shorts for $5 more than the top cost, and a pair of tennis shoes that were originally $48 but were on sale for half price. She had a coupon for $2 off the package of $8 athletic socks that she also bought. How much did she spend on athletic gear?