Pools Corporation is a service company that measures its output by the number of customers served. The company has provided the following cost formulas for each of its costs: Wages and salaries $65,000 + $30 per customer visit Utilities $1,500 + $1.00 per customer visit Rent $2,000 Supplies $20 per customer visit At the beginning of the period, Pools budgeted for 1,000 customer visits. Actual customer visits during the period were 500. The amount reported in Pool's flexible budget for utilities is: a $2,000 b. $3,500 c. $2,500 d. $4,000