Your cousin Vinnie owns a painting company with fixed costs of $200 and the following schedule for variable costs:

Quantity of houses painted per month:

1 2 3 4 5 6 7 8

Variable costs:

$10, $20, $40, $80, $160, $320, $640

Calculate average fixed cost, average variable cost, and average total cost for each quantity. What is the efficient scale of the painting company?