Below is a series of cost of goods sold sections for companies B, F, L, and R. Instructions Fill in the lettered blanks to complete the cost of goods sold sections. B F L R Beginning Inventory $135 $55 $1,145 (j) Purchases 1,944 1,540 (g) 45,917 Purchase returns and allowances 52 (d) 305 (k) Net Purchases (a) 1,087 6,450 39,562 Freight-in 125 (e) (h) 2,781 Cost of goods purchased (b) 1,670 8,309 (l) Cost of goods available for sale 2,152 1,725 (i) 50,637 Ending inventory 347 (f) 1,880 7,180 Cost of goods sold (c) 1,240 7,574 43,457 I just need the equation on how to do this. What needs to me added, subtracted, etc