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Exercise 11-4A (Algo) Determining total variable cost LO 11-1, 11-2 The following variable production costs apply to goods made by Gibson Manufacturing Corporation: Item Materials Labor Variable overhead Total Cost per unit $13.00 8.50 1.20 $22.70 Required Determine the total variable production cost, assuming that Gibson makes 11,000, 21,000, or 31,000 units. 11,000 Units Produced Total variable cost 21,000 31,000