Robinson Company has two products, A and B. Robinson's budget for August follows: Master Budget Sales Product A $ 275,000 165,000 Variable cost. Product B $ 528,000 396,000 $ 132,000 44,000 Contribution margin Fixed cost $ 110,000 99,000 Operating income $ 11,000 $ 88,000 Selling price $ 125 $ 60 On September 1, these operating results for August were reported: Operating Results Product Sales $ 120,750 Variable cost 80,500 Product B $ 641,700 496,800 $ 144,900 44,000 Contribution margin. Fixed cost $ 40,250 99,000 Operating income. $ (58,750) $ 100,900 10,350 Units sold 1,150 Required: 1. For each product, determine the following variances measured in dollars of contribution margin: Product A Product B a. Flexible-budget variance b. Sales volume variance c. Sales quantity variance d. Sales mix variance