Your company has the following total cost and average total, average variable, and marginal cost curves: A graph of total cost, with quantity (or Q) on the horizontal axis and total cost (or TC) in dollars on the vertical axis. The curve increases at a decreasing rate until about Q = 30, then increases at an increasing rate thereafter. The curve connects the following points (listed as quantity, cost): (0 units, $200); (10 units, $220); (20 units, $250); (30 units, $280); (40 units, $295); (5