Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2011 purchases and sales transactions. Date Activities Units Aquired Units Sold at Cost at Cost Jan. 1 Beg. Inventory 600unt @ $44/unt Feb. 10 Purchase 200unt @ $40/unt March 13 Purchase 100unt @ $20/unt March 15 Sales 400unt @$75/unt Aug 21 Purchase 160unt @ $48/unt Sept 5 Purchase 280unt @ $48/unt Sept 10 Sales 200unt @$75/unt Totals- 1340 units 600 units Rquired- 1. Compute Cost of Goods available for sale and the number of units available for sale. 2. Compute the number of units in ending inventory. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) specific indication-units sold consist of 500 units from beginning inventory and 100 units from the March 13 purchase, and (d) weighted average. (Round per unit cost to three decimals, but inventory balances to the dollar.) 4. Compute gross profit earned by the company for each of the four costing methods in part 3. 5. If the company's manager earnes a bonus based on a percent of gross profit, which method of inventory costing will the manager likely prefer