can you break it down so i can understand it please

A manufacturer of skateboards offered a 6/4/3 chain discount to many customers. Bob's Sporting Goods ordered 15 skateboards for a total $632 list price. a. What was the net price of the skateboards? (Do not round intermediate calculations. Round your final answer to the nearest cent.) Net price b. What was the trade discount amount? (Do not round intermediate calculations. Round your final answer to the nearest cent.) Trade discount nces