Swifty Company had a beginning inventory on January 1 of 200 units of Product 4-18-15 at a cost of $20 per unit. During the year, purchases were as follows. Swifty Company uses a periodic inventory system. Sales totaled 1,040 units. Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (Round answers to 0 decimal places, e.g. 1,250.)