The Roberts Company uses a flexible budget to plan and control manufacturing overhead costs. Overhead costs are applied to products on the basis of direct labor-hours. The standard cost card shows that 5 direct labor-hours are required per unit of product. Roberts Company had the following budgeted and actual data for March: *Represents the denominator activity for the month. he production volume variance for March is: a. $1,000 favorable. b. $5,000 favorable. c. $2,000 unfavorable. d. $5,000 unfavorable. e. Some other amount