Please help with Specific Identification Method??

Gladstone Company 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 annual accounting period, December 31. Units 3,100 Unit Cost $ 40 Transactions Beginning inventory, January 1 Transactions during the year: a. Purchase, January 30 b. Sale, March 14 ($100 each) c. Purchase, May 1 d. Sale, August 31 ($100 each) 55 4,400 (2,750) 3,100 (3,200) 70 Assuming that for Specific identification method (item 1d) the March 14 sale was selected two-fifths from the beginning inventory and three-fifths from the purchase of January 30. Required: 1. Compute the amount of goods available for sale, ending inventory, and cost of goods sold at December 31 under each of the following inventory costing methods: a. Last-in, first-out. b. Weighted average cost. c. First-in, first-out. d. Specific identification, assuming that the March 14 sale was selected two-fifths from the beginning inventory and three-fifths from the purchase of January 30. Assume that the sale of August 31 was selected from the remainder of the beginning inventory, with the balance from the purchase of May 1. 2-a. Of the four methods, which will result in the highest gross profit? 2-b. Of the four methods, which will result in the lowest income taxes? Complete this question by entering your answers in the tabs below. Req 1 Req 2A Reg 2B Compute the amount of goods available for sale, ending inventory, and cost of goods sold at December 31 under each of the inventory costing methods. (Round intermediate calculations to 2 decimal places and final answers to the nearest whole dollar amount.) Ending Inventory Cost of Goods Sold a. Last-in, first-out b. Weighted average cost c. First-in, first-out d. Specific identification Amount of Goods Available for Sale $ 583,000 $ 583,000 $ 583,000 $ 583,000 $ $ $ AEA 209,250 255,750 302,250 $ $ $ 373,750 327,250 280,750