For every option simply write what the starting cost is in the top box for every option. Then multiply the monthly cost by how many months for each box and then add the starting cost. The result of the multiplication and addition will be what you put in each box.
The third one. The square in the top left can only fold to the right or down.... which means there is guaranteed to be an open side remaining on the square.
First calculate after tax tire price $390.60 / 4 = $97.65 after tax price per tire take the $97.65 divided by 90 97.65 / 90 = 1.085 1.085 is the rate of tax he paid per tire
