Also imagine the false discovery rate of <whatever analysis you think you can do> with the thousands of products which exist in a grocery store!
“Ah look we found collusion in salty snacks between weeks 38 and 45 of 2022 in stores 1, 5 and 13!”
Even if you knew what analysis to do (and you don’t) you are going to end up crying wolf a million times and solving no problem at all.
Again - a worthy effort but the methods just don’t exist.