Answer:
$135 in total.
Explanation:
A plumber charges a one-time down payment of $60, and $25 per hour.
He works 3 hours. Multiply his cost per hour with the amount of hours he worked:
3 x 25 = 75
Now, add the number gotten with his one-time payment:
75 + 60 = 135
$135 is how much he charges.
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