i would like to have the explanation

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 25 points Units 1.500 Unit Cost $ 60 T. H Transactions Beginning inventory, January 1 Transactions during the yeart 8. Purchase, January 30 b. Sale, March 14 (5100 each) c. Purchase, May 1 d. Sale, August 31 (5100 each) 72 2,600 (1.150) 1,300 (1.600) 90 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. Assume that the sale of August was selected from the remainder of the beginning Inventory, with the balance from the purchase of May 1 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: (Round Intermediate calculations to 2 decimal places and final answers to the nearest whole dollar amount.) costoro Amount of Goods Ending Inventory Available for Sale 15 394 2001 Last-in, first-out TESS Prey 1 of 4 Help Amount of Goods Available for Sale Ending Inventory Cost of Goods Sold 25 a. Last-in, first-out b. Weighted average cost C. First-in, first-out d. Specific identification points 394,200 394.2007 394,200 $ $ $ 394,200 eBook Print 2-a. Of the four methods, which will result in the highest gross profit? Last-in, first-out Weighted average cost First-in, first-out Specific identification Graw 2-a. Of the four methods, which will result in the highest gross profit? Last-in, first-out Weighted average cost First-in, first-out Specific identification 2-b. Of the four methods, which will result in the lowest income taxes? Last-in, first-out Weighted average cost First-in, first-out Specific identification