You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
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Question: Paula 's aunt gave her $ 109 to spend on clothes at the mall . She bought 2 shirts that cost $ 11 each and a pair of pants that cost $ 13 . How much money does Paula have left to buy more clothes ?

Answer: 74

Question: A new building needed 14 windows . The builder had already installed 5 of them . If it takes 4 hours to install each window , how long will it take him to install the rest ?

Answer: 36

Question: 1 cell phone plan costs 49.95 dollars per month . The first 2500 minutes of use are free . Each minute thereafter costs 0.25 dollars . For a bill of 112.45 dollars , how many minutes over 2500 was the cell phone in use ?

Answer:
250