Easy, replace all price tags with qr codes that you scan with your phone. Then they can make the price whatever they want for whomever they want individually. More realistically they will use an categorization AI to put people into rulesets which set their prices.

Here is a great video to illustrate and educate: m.youtube.com/shorts/acpd3UXQdmw

And an article to back it up: fool.com/…/walmart-rolls-out-digital-pricing-coul…