Ah, this applies practically every day as I am forever trying to find ways to curtail my expenditure, especially food as prices are going up all the time.
I go shopping armed with a list, and in the past there would be a price alongside each item. This was to make sure I kept within budget as if the item was more expensive than my list, I either bought less (ie 3 tins instead of 4) or didn’t buy it at all.
It’s hopeless shopping when I’m hungry though………. all the yummy things seem to be on special offer, so I would have ‘Treat’ on my list with £2 by the side.