Beginning inventory, purchases, and sales for an inventory item are as follows: Sept 1 Sept 5 Beginning Inventory Sale Sept 17 Purchase Sept 21 Sale Sept 28 Purchase 24 Units @ $10 each 17 Units 10 Units @ $11 each 8 Units 10 Units $12 each Assuming a perpetual inventory system, determine (a) the cost of the merchandise sold for September sales and (b) the inventory on September 30 under the following flow assumptions 1) FIFO 2) LIFO 3) Moving Average