Rock Resources, Inc., mines copper. Its smelting process also yields a byproduct, molybdenum, that can be sold for industrial use. Both products are sold at the splitoff point. Rock Resources started November 2020 with no inventories and spent $550,000 on operations that month. Production and sales information for November are given below: (Click the icon to view the information for November.) What is the gross margin for Rock Resources, Inc., under the production method and the sales method of accounting for byproducts? Begin by calculating the gross margin under the production method and then the sales method. (Enter a "0" for any cells with a zero balance. For the main product inventory: Calculate the proportion of inventory first, then complete your calculation. Enter all numbers in thousands of dollars.) Production Sales method method More info Revenues Main product $ 851,200 0 851200 65550 Byproduct Total revenues 851,200 916750 Copper Molybdenum Production (in tons) Sales (in tons) Selling Price per ton 32.000 24,320 $ 35 4,350 3,450 $ 19 550000 Cost of goods sold Total manufacturing costs Deduct value of byproduct production Net manufacturing costs Deduct main product inventory 550,000 82,650 0 Print Done 467,350 112,164 550000 113793 Cost of goods sold 355,186 436207 $ 496,014 480543 Gross margin