Cardboard boxes are produced in a perfectly competitive market. Each identical rm has a short-run total cost curve of TC = 3Q318Q2 + 3OQ + 50, where Q is measured in thousands of boxes per week. The rm's associated marginal cost curve is MC = 992 36Q + 30. Calculate the price below which a rm in the market will not produce any output in the short run, i.e., the shutdown price