Can you explain how to solve this math problem: Perry wants to buy a new modern bedroom set for $2000.  He received $200.00 in gift cards over the holidays that he can use toward the set.  The store is currently offering the entire set at 15% off.  If he signs up for the store credit card and uses it to buy the set, he will save an additional 10% off on the discounted set.  What is the final price of the set?