It’s a website that lets you sort amazon by price per ounce/pound/count
Some examples are:
Cheapest rice per pound https://bangyourbuck.com/search/rice/Lb/US/grid
Cheapest batteries by count: https://bangyourbuck.com/search/aa batteries/Count/US/grid
Hard drives by terabyte: https://bangyourbuck.com/search/hard drive/Terabyte/US/grid
Been using it for months, and I can’t stand using Amazon without it now.
Curses!
Garbage in, garbage out I suppose!
Charmin really is the king of “1 sheet equals 3, and 1 roll is 2, but our sheets are half the size! So really this roll is 12 rolls!”