I don't get 2nd part help!(The three red boxes are incorrect)

Sales Cost $60,000 $52,000 May 1 5 9 13 24 27 30 Beginning inventory Sale Purchase Purchase Sale Sale Purchase 150 units 100 units 50 units 200 units 200 units 50 units 75 units $22,000 $96,000 $112,000 $32,000 $39,600 (a1) Your answer is correct. Calculate Saddlery Company's cost of goods sold, gross margin, and ending inventory using FIFO. Cost of goods sold Gross margin 42000 Ending Inventory 63600 SHOW ANSWER LINK TO TEXT LINK TO TEXT Attempts: 1 of 3 used (a2) x Your answer is incorrect. Try again. Calculate Saddlery Company's cost of goods sold, gross margin, and ending inventory using weighted average. (Round calculations for cost per unit to 2 decimal places, e.g. 10.52 and final answers to 0 decimal places, e.g. 61,052.) Cost of goods sold Gross margin Ending Inventory 508.80