Gladstone Company tracks the numbet of units purchased and sold throughout esch accounting period but apples its inventory costing method ot the end of each period, as if it uses a periodic inventory system. Assume its accounting records peovided the followng information at the end of the annual accounting period, Decomber 31 . Assuming that for Specific identification method (itom fd) the March 14 sole was selected two-finhs from the beginning inventery and three-fifths from the purchase of January 30 . Required: 1. Compute the amount of goods avalable for sale, ending imvontory, and cost of goods sold at December 31 under each of the following inventory costing methods. a. Lastin, first-out. b. Weighted average cost. c. First-in, first-out. d. Specficidentification, assuming that the March 14 salo was selected two-tifths from the beginning inventory and three-fiths from the purchase of January 30 . Assume that the sale of August 31 was solected from the remainder of the beginning inventory, with the balance from the purchase of Msy 1 . 2-a. Or the four methods, which will resutt in the highest gross profit? 2.b. Of the four methods, which will tesuit in the lowest income taves? Complete this question by entering your answers in the tabs below. Compute the amount of goods avallable 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.j