Why don grocery store sites let you look at their grocery prices online?
I am not a webmaster for a grocery store but I have some years working in the business. Prices may vary by region or even by store in order to meet different competitiveness circumstances and different costs of doing business. Those prices change quickly. If you are trying to go off on some grocery-store conspiracy theory, if you knew the first thing about the business you would know that its margin of net profit typically runs one percent. Americans spend a relatively tiny portion of their income on food – low by international standards and low by our own historical standards. If other industries worked as hard to be competitive and efficient, there would be minimal or no problems with jobs going overseas.