This Problem Set is a part of the Lesson 14, Unit 5, Grade 7. A furniture store pays a wholesale price for a mattress. Then, the store marks up the retail price to 150% of the wholesale price. Later, they put the mattress on sale for 50% off of the retail price. A customer just bought the mattress on sale and paid $1,200. What was the retail price of the mattress, before the discount? What was the wholesale price, before the markup?