Mary skipped going to a play and instead spent the same amount of money at the mall purchasing a $3.00 ice cream cone. A $5.00 frappe, and a $7.00 salad. The opportunity cost of going to the mall is

Mary skipped going to a play and instead spent the same amount of money at the mall purchasing a $3.00 ice cream cone. A $5.00 frappe, and a $7.00 salad. The opportunity cost of going to the mall is

Nothing because they both cost $15.00

$30.00, the cost of the play and the cost of the ice cream cone, frappe, and salad.

The value Mary places on the play.

It cannot be determined from the information given