Amazon has Angel Soft Toilet Paper, 36 Mega Rolls Bath Tissue for $15.12. Check out with S&S and final cost will be $14.36 or $12.85 w/ 5+ S&S. This works out to ~$0.105/regular roll (even lower w/S&S discount) as these are quadruple rolls (36*4=144 regular rolls).
https://www.amazon.com/gp/product/B01AZ15DF0