Since the area of siding is 1800 square feet
Since each box of siding cover 100 square feet
Then divide them to find the number of siding boxes is needed
[tex]\begin{gathered} N=\frac{1800}{100} \\ \\ N=18 \end{gathered}[/tex]1. 18 siding boxes are needed
Since the cost of each siding box is $220.41, then
Multiply 18 by 220.41 to find the cost of siding
[tex]\begin{gathered} C=18\times220.41 \\ \\ C=\text{ \$}3967.38 \end{gathered}[/tex]2. Cost of siding = $3967.38
Since there are 15 windows
Since the cost of each window is $275.00, then
Multiply 15 by 275.00 to find the cost of all windows
[tex]\begin{gathered} W=15\times275.00 \\ \\ W=\text{ \$}4125.00 \end{gathered}[/tex]3. The windows cost $4125.00
To find the total cost of the remodeling job materials add the 2 costs above
[tex]\begin{gathered} T.C=3967.38+4125.00 \\ \\ T.C=\text{ \$}8092.38 \end{gathered}[/tex]4. The total cost of the remodeling job material is $8092.38