The following data are available for Sellco for the fiscal year ended on January 31,2020 : Required: a. Calculate cost of goods sold and ending inventory under the cost flow assumptions, FIFO, LIFO and Weighted average (using a periodic inventory system): (Round unit cost to 2 decimal places.) b. Assume that net income using the weighted-average cost flow assumption is $16,000. Calculate net income under FIFO and LIFO. (Round unit cost to 2 decimal places.)