Duo, Inc., carries two products and has the following year-end income statement (000s omitted): Product AR-10 Product ZR-7 Budget Actual Budget Actual Units 3,500 4,620 10,500 10,780 Sales $ $ 10,500 $ 12,474 $ 21,000 $ 22,638 Variable costs 4,200 4,620 10,500 11,319 Fixed Costs 3,150 3,119 4,200 4,528 Total Costs $ 7,350 $ 7,739 $ 14,700 $ 15,847 Operating income $ 3,150 $ 4,736 $ 6,300 $ 6,791 If products AR-10 and ZR-7 are substitutes for each other, a sales mix and sales volume variation for the combined products can be calculated. If this combination is calculated, the sales quantity variance is: (Round intermediate calculations to 5 significant digits, and your final answer to the nearest whole dollar amount.)