O 3 Required information [The following information applies to the questions displayed below.) The following information pertains to Mason Company for Year 2: Beginning inventory Units purchased 140 units @ $ 42 486 units $63 Book Ending inventory consisted of 54 units. Mason sold 492 units at $126 each. All purchases and sales were made with cash. Operating expenses amounted to $3,825. Print Required a. Compute the gross margin for Mason Company using the following cost flow assumptions: (1) FIFO, (2) LIFO, and (3) weighted average. (Round cost per unit to 3 decimal places and final answers to the nearest whole dollar amount.) ferences Gross Margin FIFO LIFO Weighted average