Nash's Department Store uses a perpetual inventory system. Data for product E2-D2 include the following purchases. On June 1, Nash's sold 31 units, and on August 27,43 more units. In its first month of operations, Sheridan Electronics made three purchases of merchandise in the following sequence: (1) 280 units at NT $180, (2) 420 units at NT $210, and (3) 180 units at NT $240. Sheridan uses a periodic inventory system. (a) Your answer is correct. Assuming there are 440 units on hand, compute the cost of the ending inventory under the FIFO method. The cost of the ending inventory NTS eTextbook and Media Attempts: 3 of 6 used (b) Assuming there are 440 units on hand, compute the cost of the ending inventory under the average-cost method. (Round average-cost per unit and final answer to 2 decimal places, e.g. 1.25.) The cost of the ending inventory NT\$