Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
--------
Question: robin 's hair was 15 inches long . if she cut off 5 inches how long is her hair now ?

Answer: 10

Question: carey and pat are moving chairs to the gym . they agreed to move 74 chairs . carey moved 28 chairs . pat has moved 29 chairs . how many more chairs do they have left to move ?

Answer: 17

Question: edward started his own lawn mowing business . in the spring he made 2 dollars mowing lawns and in the summer he made 27 dollars . if he had to spend 5 dollars buying supplies how much money did he end up with ?

Answer:
24