A physical inventory on December 31, 2011, indicates that 400 units are on hand and that they came from the March 1 purchase. Required Compute the cost of goods sold for the year ended December 31, 2011, and the ending inventory under the following cost assumptions: a. First-in, first-out (FIFO) b. Last-in, first-out (LIFO) c. Average cost (weighted average) d. Specific identification (SEE ATTACHED FILE FOR FULL QUESTION)