In September, Larson Inc. sold 45,000 units of its only product for $438,000, and incurred a total cost of $375,000, of which $43,000 were fixed costs. The flexible budget for September showed total sales of $450,000. Among variances of the period were: total variable cost flexible-budget variance, $8,000U; total flexible-budget variance, $75,000U; and, sales volume variance, in terms of contribution margin, $56,000U. The total sales revenue in the master budget for September, to the nearest dollar, was: Multiple Choice 0 $450,000 0 $506,000. 0 $515,000. 0 $650,000. 0 $715,000