During a recent month, Cleveland Company planned to provide cleaning services to 30 customers for $25 per hour. Each job was expected to take 3 hours. The company actually served 10 more customers than expected, but the average time spent on each job was only 2.5 hours each. Cleveland's revenues for the month were

a. $250 more than expected.

b. $250 less than expected.

c. $750 more than expected.

d. Cannot be determined from data given