please help me out with this exercise

Alec Bohm is the owner of Alec Bohm Baseball Bats, Inc (ABBBI). ABBBI uses a periodic inventory system to determine cost of goods sold and ending inventory balances at the end of each accounting period. ABBBI produces many different models of baseball bats, but. its best selling product is its "Pro Model" maple bat. ABBBI's accounting records provided the following information regarding the "Pro Model" bat at the end of the accounting period, October 31. The "Pro Model" bat sells for $12 per unit. For the Specific identification method, ABBBI took the units from the October 13 sale out of its beginning inventory, and the units from the October 21 sale were taken from the October 16 purchase. Required: 1. Compute ABBBI's cost of goods available for sale, ending inventory, and cost of goods sold at October 31 under each of the following inventory costing methods: (Round your intermediate calculations to 2 decimal places and final answers to the nearest dollar amount.)