I think I got it if someone could verify.
There are 55 cavities between the exterior studs.
Each cavity is approx 7.68 cubic feet
55 X 7.68= 422.4 cubic feet total
For dense pack they suggest a target of 3.5lbs per cubic foot, so
3.5lbs X 422.4 Cubic Feet= 1478.4 lbs total
there are 18.1 lbs per bag so
1478.4 divided by 18.1 = 81.67 bags required. Round up to 82
82 X $5.99 per bag = $491.18
Seems like it should cost more.
Is this math correct?
