LU 18-1a PRACTICE GujZ WITH WORKED OUT SOLUTION Need more practice? Try this Extra Practice Quiz (check igures in the Interactive Chapter From the following, calculate (a) the cost of ending inventory and (b) the cost of goods sold under the assumption of (1) weighted average, (2) FIFO, and (3) LIFO (ending inven tory shows 58 units): Number of books purchased for resale 20 60 40 50 cam be found in Appendix B at end of text. Cost per unit $4 Total $ 80 180 January 1 inventory March 1 April 1 November1 7 350