In September, Larson Inc. sold 40,000 units of its only product for $339,000 and incurred a total cost of $315,000.00 which $34,000 was fixed costs. The flexible budget for September showed total sales of $390,000. Among variances of the period were: total variable cost flexible-budget variance, $7,000U; total flexible-budget variance, $81,000U; and, sales volume variance, in terms of contribution margin, $36,000U. The actual amount of operating income earned in September, to the nearest dollar, was: Multiple Choice $105,000 $24,000 $81,000. Multiple Choice $105,000. $24,000 $81,000 $141,000 $40,000