Convex Mechanical Supplies produces a product with the following costs as of July 1, 20X1: Beginning inventory at these costs on July 1 was 12,400 units. From July 1 to December 1 , Convex produced 27,500 units. These units had a material cost of $9 per unit. The costs for labor and overhead were the same. Convex uses FiFO inventory accounting. a. Assuming that Convex sold 29,500 units during the last six months of the year at $18 each, what would gross profit be? b. What is the value of ending inventory