Scrappers Supplies 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.

I do not know how to find the units from beginning inventory, march 2 purchase, and june 30 purchase. I am very confused please help I attached the table and that I have worked on my self. I also know that the total cost of goods sold is equal to 435. thank you!

IP: Although the purchases and sales are listed in chronological order, Scrappers determines the cost of goods sold after all of the ourchases have occurred. Required: 1. Compute the cost of goods available for sale, cost of ending inventory, and cost of goods sold at December 31 under each of the following inventory costing methods: (Round "Cost per Unit" to 2 decimal places.) a. Last-in, first-out. b. Weighted average cost. c. First-in, first-out. d. Specific identification, assuming that the April 1 sale was selected one-fifth from the beginning inventory and four-fifths from the purchase of March 2. Assume that the sale of August 1 was selected from the purchase of June 30. 2. Of the four methods, which will result in the highest gross profit? Which will result in the lowest income taxes? d. Compute the cost of goods available for sale, cost of ending inventory, and cost of goods sold at December 31 using the Specific identification method. Assume that the April 1 sale was selected one-fifth from the beginning inventory and four-fifths from the purchase of March 2. Assume that the sale of August 1 was selected from the purchase of June 30. (Round "Cost per Unit" anwers to 2 decimal places.)