Bugos Corporation is a service company that measures its output by the number of customers served. The company has provided the following fixed and variable cost estimates that it uses for budgeting purposes. When the company prepared its planning budget at the beginning of March, it assumed that 40 customers would be served. In March, 35 customers were actually served. What would the flexible budget performance report for March show for an activity variance for "Employee salaries and wages?" $4,500 Favorable $4.500 Unfavorable $11,850 Favorable $11,850 Unfavorable $0