Adelivery truck takes potatoes and carrots to stores. the total weight of the load, in pounds, can be found using the expression 50 p + 40 c , where p is the number of bags of potatoes and c is the number of boxes of carrots in the load. what is the meaning of the 50 in the expression?

each bag of potatoes costs $50

the whole load weighs 50 pounds.

each bag of potatoes weighs 50 pounds.

there are 50 bags of potatoes in a load.