Marigold-Mart Centre Inc. opened for business on May 1, and uses a perpetual inventory system. During May, the company had the following purchases and sales for one of its products: Purchases Sales Date Units Unit Cost Units Unit Price May 1 133 $100 3 92 $250 8 109 115 13 92 275 15 58 120 20 58 300 27 46 325 (a) Your answer is incorrect. Determine the cost of goods sold and cost of ending inventory using (1) FIFO and (2) average cost. Ignore the effect of income tax.