Can someone explain how to get the weighted average (please show calculations)

The following five transactions occurred in Year 3: 1. First purchase (cash): 120 units @$95 2. Second purchase (cash): 205 units @ $103 3. Sales (all cash): 370 units @ $198 4. Paid $13,400 cash for salaries expense 5. Paid cash for income tax at the rate of 25 percent of income before taxes Required a. Compute the cost of goods sold and ending inventory, assuming (1) FIFO cost flow, (2) LIFO cost flow, and (3) weighted-averag cost flow. Compute the income tax expense for each method. b-1. Use a vertical model to show the Year 3 income statement under FIFO, LIFO, and weighted average. (Hint. Record the event under an accounting equation before preparing the statements.) b-2. Use a vertical model to show the Year 3 balance sheet under FIFO, LIFO, and weighted average. (Hint. Record the events under an accounting equation before preparing the statements.) b-3. Use a vertical model to show the Year 3 statement of cash flows under FIFO, LIFO, and weighted average. (Hint. Record the events under an accounting equation before preparing the statements.) Complete this question by entering your answers in the tabs below. Compute the cost of goods sold and ending inventory, assuming (1) FIFO cost flow, (2) LIFO cost flow, and (3) weightedaverage cost flow. Compute the income tax expense for each method. Note: Do not round intermediate calculations. Round your answers to nearest whole dollar amount