Need to know if correct and help in blank columns.

Orion Iron Corp. tracks the number of units purchased and sold throughout each year but applies its inventory costing method at the end of the year, 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 Unit Transactions Units Cost 350 $12 a. Inventory, Beginning For the year: b. Purchase, April 11 c. Purchase, June 1 d. Sale, May 1 (sold for $40 per unit) e. Sale, July 3 (sold for $40 per unit) f. Operating expenses (excluding income tax expense), $18,300 10 800 850 350 640 Required 1. Calculate the number and cost of goods available for sale 2,000 units $25,800 Number of Goods Available for Sale Cost of Goods Available for Sale 2. Calculate the number of units in ending inventory Ending Invento 1,010 units