Jack brought 3 slices of cheese pizza and 4 slices of mushroom pizza for a total cost of $12.50. Grace bought 3 slices of cheese pizza and 2 slices of cheese pizza and 2 slices of mushroom pizza for a total cost of $8.50. What is the cost of this one slice of mushroom pizza?
O $1.50
O $3.00
O $3.50
O $2.00