[Question]Tracy set up a booth at an art fair. 20 people came to look at her art. Four of those customers bought two paintings each. The next 12 of those customers bought one painting each. The last 4 customers bought four paintings each. How many paintings did Tracy sell at the art fair?
[Answer]The first 4 customers bought 4 * 2 = 8 paintings. The next 12 customers bought 12 * 1 = 12 paintings. The last 4 customers bought 4 * 4 = 16 paintings. In total Tracy sold 8 + 12 + 16 = 36 paintings. The answer is 36.

[Question]Joe sells cookies for 20% more than it costs to make them. If he sold 50 cookies and earned $60, how much do the cookies cost to make?
[Answer]He sold the cookies for $1.20 each because 60 / 50 = 1.2. They cost $1 to make because 1.2 / 1.2 = 1. The answer is 1.

[Question]Of the 3 friends, Harry has 4 times as many fish as Joe, and Joe has 8 times as many fish as Sam does. If Sam has 7 fish, how many fish does Harry have?
[Answer]Joe has 8 * 7 = 56 fish. Harry has 4 * 56 = 224 fish. The answer is 224.

[Question]Tonya has $150.00 on her credit card. If she leaves any balance on her card at the end of the month, she is charged 20% interest. If she makes a $50.00 payment on her card, what will be the new balance?
[Answer]
Her card has a $150.00 balance and she makes a $50.00 payment so the new balance is 150 - 50 = $100.00. She didn't pay it off so she is charged 20% interest on her $100.00 balance so the interest is .20 * 100 = $20.00. Her balance was $100.00 and she was charged $20.00 in interest so her new balance is 100 + 20 = $120.00. The answer is 120.