Jim decides to open up a bike shop. The most common repair he does is fixing bike tires. He charges $20 for this and it cost him $5 in parts. In one month Jim does 300 of these repairs. He also does 2 more complex repairs for $300 each and cost $50 in parts. He also sells $2000 profit worth of things from his retail shop. If rent and other fixed expense for the shop is $4000 a month how much profit did the shop make? Let's think first. Chain of thought:
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From each tire repair, he made 20 - 5 = $15 profit. So repairs made him a profit of 15 * 300 = $4500. The two complex repairs each made him 300 - 50 = $250 profit. So those added 250 * 2 = $500. So his total profit from everything was 4500 + 500 + 2000 = $7000. So he made a profit of 7000 - 4000 = $3000.
Therefore, the answer is 3000.
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