A new Economics textbook is published in January. The bookstore on campus buys 420 copies at $76 each in February, an additional 995 copies in May at $78 each, and 610 copies in September at $81 each. At the end of December of that year, the bookstore has sold 1,870 copies of the text. (Note: The sum of cost of goods sold and ending inventory might not add up due to rounding.) a. Using the weighted average inventory costing method, calculate the cost of goods sold and the cost of ending inventory. (Round your intermedlate calculations to 2 decimal places and final answers to the nearest dollar amount.) Cost of Goods Sold Ending Inventory h Using the FIFO inventory costing method, calculate the cost of goods sold and the cost of ending b. inventony Cost of Goods Sold Ending Inventory c Using the LIFO inventory costing method, calculate the cost of goods sold and the cost of ending Cost of Goods Sold Ending Inventory