If you bulk-buy webril, 4" elastic plaster, 4" regular plaster, 4" fiberglass, 4cmx4cm foam squares*, felt straps for padding, paper tape, gauze squares, and foam padding to protect the toes**, then the unit cost came out to $22/kit***
*these are $4/square, probably the most expensive component lol
**I had to order this from a heating/insulation company, got a huge square that has lasted me going on 6+ years, don't remember who to reorder from
***not included, the most expensive component: the cost of your time preparing the kits, applying the cast, and taking it off next visit, which--let's be honest--in PP you have no help with.