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Using the following information, what is the total for variable costs? President's salary $150,000 Manufacturing direct labor 81,000 Advertising 154,000 Factory janitor's salary 55,000 Lease on manufacturing plant 110,000 Depreciation on sales staff cars 75,000 Manufacturing direct materials 199,000 Indirect labor ** 29,000 Sales commissions 37,000 Total $890,000 Indirect labor ** is a variable cost $280,000 $346,000 $317,000 $544,000 $238,000