Answer:
$66.24
Explanation:
The area of Vince's porch is:
8 feet x 12 feet = 96 square feet
To find the cost of the stain, we need to multiply the area of the porch by the cost per square foot:
96 square feet x $0.69 per square foot = $66.24
So it will cost $66.24 to buy enough stain for the whole porch.