I mainly need help with the Perpetual FIFO, LIFO, Weighted Average, and Specific Identification. pleasee

Montoure Company uses a perpetual inventory system. It entered into the following calendar-year purchases and sales transactions. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and ( ( ) specific identification. (For specific identification, units sold consist of 660 units from beginning inventory, 230 from the February 10 purchase, 110 from the March 13 purchase, 110 from the August 21 purchase, and 335 from the September 5 purchase.) Complete this question by entering your answers in the tabs below. Compute the cost assigned to ending inventory using FIFO. Note: Round your average cost per unit to 2 decimal places. 4. Compute gross profit earned by the company for each of the four costing methods. Note: Round your average cost per unit to 2 decimal places. 5. The company's manager earns a bonus based on a percent of gross profit. Which method of inventory costing produces the highest bonus for the manager? Specific Identification Weighted Average LIFO FIFO