These are all part if the same question. please answer it right.

Montoure Company uses a periodic inventory system. It entered into the following calendar-year purchases and sales transactionis. kequirea: 1. Compute cost of goods available for sale and the number of units avalable for sale. 2. Compute the number of units in ending inventory. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, (c) weighted average, and ( d ) specific identification. For specific identification, units sold consist of 615 units from beginning inventory, 315 from the February 10 purchase, 215 frem the March 13 purchase, 65 from the August 21 purchase, and 280 from the September 5 purchase. Note: Round your average cost per unit to 2 decimal places. Round your final answers to the nearest whole dollar amount. 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. Round your final answers to the nearest whole dollar amount