Write an expression for the following problem, and then use the expression to solve the problem: You go grocery shopping once a week and buy a gallon of milk costing $5, two heads of lettuce costing $3 each, and three pounds of hamburger meat costing $6 per pound. Write an expression that could be used to calculate your average daily food cost. If you increase your salad consumption to 3 heads per week and decrease meat consumption to 2.5 pounds per week, what is your average daily food cost? O $3.86 $2.71 $2.64 $4.00 O $2.36 $2.86 O $2.93 O $3.14 O $3.71 O $4.14