This was why I am confused. This is all that was given to me. Its a discussion question I can not answer and its over inventory

4) Calculate Cost of Goods Sold (COGS) and the Gross Profit Beginning Inventory 100 $ Net Purchases 245 Cost of Goods Available Ending Inventory 145 Cost of Goods Sold Calculate Gross Profit (a) Net Sales $ 800 $ COGS Gross Profit