Question

Juan charges $22.50 per hour for consulting services. how many will he charge for seven and a half hours of consulting​

Answer 1

$168.75.
Multiply the fee by the amount of hours: 22.5 x 7.5 = 168.75

Answer 2

The half-hour difference may be rounded up to the next hour, unless he charges by the half-hour. If he agrees to accept a half-hour pay then the total would be $168.75. If he demands the full amount rounded up, then you pay the sum of $180. Also be mindful of any sales tax, if the State demands it.