You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Kelly has 20 nintendo games and 70 sony games.

Question: How many nintendo games does she need to give away so that she will have 12 nintendo games left?
8

Context: Zachary did 46 push-ups and 58 crunches in gym class today. David did 38 more push-ups but 62 less crunches than zachary.

Question: How many more crunches than push-ups did Zachary do?
12

Context: Dan has $ 4. He had $ 3 left with him after he bought a candy bar.

Question: How much did the candy bar cost?
1