its telling me that the 83.4408 is incorrect and its driving me insane. pls help

During the year. Wright Company sells 425 remote control airplanes for $110 each. The company has the following inventory purchase transactions for the year. Date Jan. 1 May. 5 Nov. 3 Transaction Beginning inventory Purchase Purchase Number of Units 60 235 170 465 Unit Cost $ 79 82 87 Total Cost $ 4,740 19,270 14,790 $38,800 Calculate ending inventory and cost of goods sold for the year, assuming the company uses weighted average cost. (Round your average cost per unit to 4 decimal places.) Weighted Average Cost Cost of Goods Available for Sale Cost of #of Average Cost per Goods units unit Available for Sale 60 $ 4,740 Answer is complete but not entirely correct. Cost of Goods Sold - Weighted Ending Inventory - Weighted Average Average Cost Cost # of Average # of units Cost of Average units Ending in ending sold Goods Sold Unit inventory unit Inventory Cost per Cost per Beginning Inventory Purchases May 5 Nov 3 235 170 465 19,270 14,790 38,800 Total $83.4408 $ 425 $ 83.4408 * $ 35,462.34 40 $ 83.4408 $ 3,337.63