Suppose that a firm's total fixed cost is Rs. 100, and the marginal cost schedule of a firm is the following :
Output (in units)1234567Marginal cost (in Rs)10203040506070
(i) Is the MC curve U-shaped ?
(ii) Derive the AVC schedule. Will the AVC curve U-shaped ? Discuss.
Output1234567MC10203040506070TVC103060100150210280AVC10152025303540
The MC curve is not U-shaped. As the slope of the MC curve is constant, and equal to 10, the MC curve is an upward-sloping straight line through the origin.
The AVC curve is also not U-shaped. It is an increasing curve. This is because MC is rising throughout, and this increase in MC is translated solely to an increase in AVC.