Can somebody help me figure out how to calculate the profit or loss on 12,000 bags and 25,000 bags in this problem?

The problem is Healthy Foods, Inc., sells 50-pounds of grapes to the military for $10 a bag. The fixed costs of this operation are $80,000, while the variable costs of the grapes are $.10 per pound.
I have read my chapter and it does not explain how to do this.