4. Firm's Costs Your cousin Vinnie owns a painting company with fixed costs of $250 and the following schedule for variable costs: Quantity Variable Cost Average Fixed Cost Average Variable Cost Average Total Cost (Houses Painted per Month) (Dollars) (Dollars) (Dollars) ( Dollars) 8 20 3 50 4 160 5 320 500 16 16 1.1. 6 1.1. 1.1. 1.1.1.1. 7 720 The efficient scale is houses