Not saying that this will work in US, but India is also like US, federation of states, with federal tax, state tax, city tax all over the spectrum over the leng

Not saying that this will work in US, but India is also like US, federation of states, with federal tax, state tax, city tax all over the spectrum over the length & breadth of country. All advertisements of car, butter, biscuits, house, anything which can be priced over TV/Media advertises its MRP (maximum Retail Price), which is also printed on product itself too. Retailer use stickers on shelf or on product itself to tell what is the actual price, which by law should not be more that its MRP. The taxes along the route, physically & supplier/trader wise affects the price, but it is illegal for anybody retailer to sell anything more that its printed MRP. Yes, same packet of potato chips costs R20 at capital R25 at hill stations (but its MRP shows R25).