Solution
Step 1:
Given data
Wide = 3 ft
Length = 6 ft
Step 2
[tex]\begin{gathered} Area\text{ of rectangle = width }\times\text{ length} \\ \\ =\text{ 3 ft }\times\text{ 6 ft = 18 ft}^2 \end{gathered}[/tex]Step 3
[tex]Cost\text{ = 17 }\times\text{ 18 = \$306 ft}^2[/tex]Final answer
Cost = $306