You have $5 to spend on a vending machine snack. A pack of gum will cost you $2.50, and a chocolate bar will also cost you $2.50. If you choose to buy [he pack of gum, the opportunity cost of the gum is: 0 $5 minus the enjoyment you received from the pack of gum. C) $2.50. 0 the enjoyment you would have received from the chocolate bar. 0 $2.50 plus the enjoyment you would have received from the chocolate bar