Three identical units of merchandise were purchased during March, as follows: Steele Plate Units Cost Mar. 3 Purchase 1 $830 10 Purchase 1 840 19 Purchase 1 880 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 the (a) FIFO, (b) LIFO, and (c) weighted average cost methods. Gross Profit Ending Inventory a. First-in, first-out (FIFO) < b. Last-in, first-out (LIFO) c. Weighted average cost