Five shirts are bought. Of the 5 shirts, there are 3 shirts that cost $15 each. The remaining shirts are $20 each. What is the cost, in dollars, of all 5 shirts? Think carefully first, then make a decision:
The first 3 shirts cost 15 * 3 = 45 dollars in total. There are 5 - 3 = 2 shirts remaining. The remaining 2 shirts cost 20 * 2 = 40 dollars in total. The five shirts cost 45 + 40 = 85 dollars. So, the answer is 85.