The cost of the instalation can be found by adding the fixed fee of 675 to the cost per feet multiplied by the length of the perimeter. We have:
[tex]\text{cost = 675+(fee per foot)}\cdot x[/tex]Where x is the length of the perimeter. In this case the perimeter is 120 feet. And the cost was $2,475.
[tex]\begin{gathered} 2475\text{ = 675 + (fee per foot)}\cdot120 \\ (\text{ fee per foot)= }\frac{\text{2475-675}}{120}e\text{ per foot)= }\frac{\text{2475-675}}{120} \\ (\text{ feet per foot) = }\frac{1800}{120}=15 \end{gathered}[/tex]The cost is $15 per foot.
