The publisher or the retail store must send that item to the Jail in care of the inmate's name at: Bonneville County Jail, 605 N. Capital Avenue, Idaho Falls, Idaho 83402. Religious books such as the Bible are accepted at the Jail. They must be soft bound and not enclosed inside of a removable case.
On the whole, spray foam insulation costs two to three times as much as fiberglass insulation. Fiberglass insulation costs around $0.40 per square foot. Spray foam can be significantly more expensive, but can lead to bigger savings on heating and cooling costs. It costs around $3 per square foot, with a thickness of 3 inches.
I read your quote and this is what WE spray foam insulation contractors have to deal with. Anyway, This is how I figure an estimate. First off Spray Foam costs allot! $2200 to $2800 per set of 55 Gal drums. Closed cell (2.0 @ 6.98R per inch set value) You need foam at 4 to gain an 27.92R or you could go with 3 and gain 20.94R. 3 was closer to your desired 21R so we will use it for our base.