Dominion's site says, "One 33 pound bag will cover 11 cubic feet at a one-inch depth."
https://www.dominionhemp.com/shop/large-animal-bedding-33-pound-bag
I get whatever's cheapest on Amazon. It's pretty tricky finding it locally unless you happen to be close to a manufacturer/distributor. As I don't use it as my primary bedding (and my primary bedding is free) that helps stretch it out and reduce the cost, like I buy a 33 lb bag every 1 1/2 - 2...