Current Attempt in Progress Pina Colada Corp. Inc, had a beginning inventory of 100 units of Product RST at a cost of $9 per unit. During the year, purchases were: Pina Colada Corp. uses a periodic inventory system. Sales totaled 1,460 units (a) Determine the cost of goods avalable for sale. The cost of goods available for sale eTextbook and Media Calculate average cost per unit. (Round answer to 3 decimal places, eg. 2.237) Average cost per unit eTextbook and Media Attempts: unlimit (b2) Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). Prove the accuracy of the cost of goods sold under the FIFO and LIFO methods. (Rlound per unit cost to 3 decimal places, es. 15.647 and final answers to 0 decimal places, es. 5.125