here is the formula you use: all in inches... always.. (you did not provide all the numbers here, so we will use the side) 92inches wide x 102in tall x 257in long. 102 x 257 divided by 144 so .. 26,214... divided by 144... 182 feet... times your sq ft cost, that's per side... don't feel bad... I started in this business young... and I am no good at math... I had to figure this stuff out as well. save my formula.. just remember to always use inches