Bob IncHas Gross Profit Equal to $1,000,000

Bob Inc.has gross profit equal to $1,000,000.During the year Bob Inc.purchased $300,000 worth of inventory.The sales recorded during the year equaled $1,500,000.What is the value of Bob Inc.'s cost of goods sold?

A) no answer possible
B) $ 300,000
C) $ 500,000
D) $ 800,000
E) $ 1,800,000