The area of the room is :

and if the cost is 1.25 per square foot then the total cost will be:

is $340 dollars
i will fill the boxes from top down
4(-2)-5=-13
4(1)-5=-1
4(2)-5=3
4(3)-5=7
36 ounces - 16 ounces = 20 ounces so that should add up to about 2.5cups
5.15 for the first hour after subtracting 12.20(7.15)