Bob’s drill broke down and was in the shop 3.5 days. The mechanics took 15.2 hours to repair the drill at $78 per hour and replaced $2,367.45 worth of parts. He estimated it cost $18 per hour for not having the use of his drill. He works 12-hour days.

a. What was the cost of the repair?
b. What did it cost by not having the use of the drill?
c. What did the breakdown actually cost?


a. $3,553.05
b. $756
c. $4,309.05

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