1 1 1 Three identical units of merchandise were purchased during March, as shown: Steele Plate Units Cost Mar 3 Purchase $830 10 Purchase 840 19 Purchase 880 Total 3 $2,550 Assume that one unit is sold on March 23 for $1,125. Determine the gross profit for March and ending Inventory on March 31 using (a) FIFO, (6) LIFO, and (c) average cost methods. Gross Profit Ending Inventory a. First-in, first-out (FIFO) b. Last-in, first-out (LIFO) c. Average cost