aarons chairs is in the process of preparing a production cost budget for august. actual cost in july for 120 chairs were: material cost 4630 labor cost 2530 rent 1500 depreciation 2500 other fixed cost 3200. materials and labor are the only variable costs. if the production and sales are budgeted to change to 130 chairs in august, how much is the expected total variable cost on the august budget.