In September, Larson Inc. sold 40,000 units of its only product for $460,000, and incurred a total cost of $425,000, of which $45,000 were fixed costs. The flexible budget for September showed total sales of $500,000. Among variances of the period were: total variable cost flexible-budget variance, $8,000U; total flexible-budget variance, $79,000U; and, sales volume variance, in terms of contribution margin, $48,000U. The total number of budgeted units reflected in the master budget for September, to the nearest whole number, was: