Please help! I have posted this question before and the person who helped me gave up.

Inventory Costing Methods Periodic Method Fortune Stores uses the periodic inventory system for its merchandise inventory. The April 1 inventory for one of the items in the merchandise inventory consisted of 120 units with a unit cost of $325. Transactions for this item during April were April 9 Purchased 40 units $345 per unit 14 Sold 80 units $550 per unit 23 Purchased 20 units $350 per unit 29 Sold 40 units Required a. Calculate the cost of goods sold and the ending inventory cost for the month of April using the weighted average cost method. Round your final answers to the nearest dollar. b. Calculate the cost of goods sold and the ending inventory cost for the month of April using the first-in, first out method. c. Calculate the cost of goods sold and the ending inventory cost for the month of April using the last-in, first-out method