The units of an item available for sale during the year were as follows: the required analysis, and input your answers in the questions below. Open spreadsheet a. Determine the inventory cost by the first-in, first-out method. Round your answer to the nearest dollar. $ b. Determine the inventory cost by the last-in, first-out method. Round your answer to the nearest dollar. $ c. Determine the inventory cost by the weighted average cost method. Round your answer to the nearest dollar. $