could you please show the fomrula used to get the answer?

Use the following to determine the total Gross Profit for this company during the year 2012: Beginning Inventory $ 125,000. Ending Inventory $ 250,000 2012 Total Revenue $1,400,000. Inventory Purchases $1,225,000. The Accounts Receivable balance increased $800,000 from 1/1/2012 to 12/31/2012. A. $ 125,000 B. $ 175,000 C. $ 300,000 D. $1,100,000 E. None of the above