You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: Each chocolate bar in a box cost $ 2 . If a box had 13 bars total and Rachel sold all but 4 bars , how much money would she have made ?
[EX A]: 18

[EX Q]: April 's discount flowers was having a sale where each rose was 4 dollars . If April started with 13 roses and had 4 roses left , how much money did she earn ?
[EX A]: 36

[EX Q]: John had 6 action figures , but needed 11 total for a complete collection . If each one costs $ 6 , how much money would he need to finish his collection ?
[EX A]:
30