Cid owns a mechanic shop, he charges $20 for an oil change, $30 for a repair, and $5 for a car wash. How much money did he earn if he changed the oil of 5 cars, repaired 10 cars, and washed 15 cars?
Let's think step by step below.
475
The money he earned from an oil change is $20 x 5 = $ 100.

The money he earned from the repair is $30 x 10 = $300.

The money he earned from the car wash is $15 x 5 = $75.

Therefore, Cid earned a total of $100 + $300 + $75 = $475.

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The answer is 475