Mojo Industries tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each period, as if it uses a periodic inventory system. Assume its accounting records provided the following information at the end of the accounting period, January 31. The inventory's selling price is $8 per unit. Transactions Total Cost Unit Cost Units Inventory, January $ 200 $ 400 1 2.00 Sale, January 10 (170) Purchase, January 2.50 250 625 12 Sale, January 17 (120) Purchase, January 3.50 50 175 26 Required: 1. Compute the amount of goods available for sale, ending inventory, and cost of goods sold at January 31 under each of the following inventory costing methods: a. Weighted average cost. b. First-in, first-out. c. Last-in, first-out. d. Specific identification, assuming that the January 10 sale was from the beginning inventory and