At my local supermarket the price for food varies week to week depending on whether an item is on sale. For example sometimes items are "2 of 3.00" and sometim

At my local supermarket the price for food varies week to week depending on whether an item is on sale. For example sometimes items are "2 of 3.00" and sometimes they are 2.00 each. Unless someone is keeping records it would be hard to gauge.