Aloha Company uses a perpetual inventory system. It entered into the following calendar-year 2015 purchases and sales transactions. For specific identification: May 9th sales - 80 units from beginning inventory, 100 units from May 6 purchase. May 30th sales-200 units from May 6 purchase, 100 units from May 25 purchase. Date Activities Units Acquired ar Cost Units Sold at Retail 1-May Beg Inv 150 units @$300 6-May Purchase 350 units@ $350 180 units@ $1,200 Sales 9-May 80 units@ $450 Purchase 17-May 100 units@ $458 Purchase 25-May 300 units@ $1,400 Sales 30-May 480 units 680 units Total Compute gross profit earned by the company of each of the four costing methods (LIFO, FIFI. WA SI)