(The following Information applies to the questions displayed below] The following Information pertains to Mason Company for 2016: Beginning Inventory90 units $40 Units purchased 310 units $45 Ending inventory consisted of 30 units. Mason sold 370 units at $90 each. All purchases and sales were made with cash. Operating expenses amounted to $4,100. value: 10.00 points Required a. Compute the gross margin for Mason Company using the following cost flow assumptions: (1) FIFO, (2) FO, and (3) weighted average. (Round cost per unit to 3 decimal places and final answers to tho nearest whole dollar amount.) Gross Margin FIFO LIFO Weighted average