The following information pertains to Mason Company for Year 2: Beginning inventory 90 units @ $ 70 Units purchased 250 units @ $ 72 Ending inventory consisted of 40 units. Mason sold 300 units at $144 each. All purchases and sales were made with cash. Operating expenses amounted to $3300. Required Compute the gross margin for Mason Company using the following cost flow assumptions: (1) FIFO, (2) LIFO, and (3) weighted average. What is the amount of net income using FIFO, LIFO, and weighted average? (Ignore income tax considerations.) Determine the cash flow from operating activities, using each of the three cost flow assumptions listed in Requirement a. Ignore the effect of income taxes.