need help with part b please. i've tried many methods but none of them seem to be working.

Question 2 of 10 1/2 ur tn Marigold Limited uses a perpetual inventory system. The inventory records show the following data for its first month of operations: Date Units Unit Cost Aug. 2 $70 99 3 Explanation Purchases Purchases Sales Purchases Sales Total Cost $18,130 48,807 10 259 493 (283) 876 (341) Balance in Units 259 752 469 1,345 1,004 15 118 103.368 25 (a) Your answer is correct. Calculate the cost of goods sold and ending inventory using the FIFO cost method. Cost of goods sold $ 54265 Ending inventory $ 116040 e Textbook and Media Attempts: unlimited (b) Your answer is incorrect. Calculate the cost of goods sold and ending inventory using the average cost method. (Round average cost per unit to 2 decimal places, e.g. 1.25 and final answers to decimal places, eg. 5,125.) Cost of goods sold $ Ending inventory $ e Textbook and Media Save for Later Attempts: unlimited Submit Answer MacBook Pro