I'm thinking of switching the numbers on bulk foods to a cheaper product number
Why do you want to switch numbers ?
I'm thinking of saving money. It is just a low price anyway.
It is okay to want quality products but you shouldn't tamper with the packaging to save money. It is not right and you could get the police called on you.
WTF it's just a number and I won't be tampering anything. I have access to the stores and I know I could change the numbers on the containers.
Changing numbers on the product is tampering and don't forget there are CCTVs in stores so you're going to get caught. Buy something cheaper alternative rather than scamming the store.