In September, Numbers incorporated sold 40,000 units of its only product for $240,000, and incurred a total cost of $225,000, of which $25,000 were fixed costs. The flexible budget for September showed total sales of $300,000. Among variances of the period were total variable cost flexible-budget variance, $8,000u: total flexible-budget variance, 563.000U; and, sales volume variance, in terms of contribution margin $27000U The total number of budgeted units reflected in the master budget for September was Multiple Choice 48.000 units 50,000 units