The price on sale or the coupon price is a “market price”..willing seller and buyer. Taxing above that is the kind of thing that Banana Republic’s do to offset technical smuggling and other corruption. It is truly a bad idea and will just cause companies to change their marketing practice so that the state gets the lower amount. Consumers and retailer aren’t stupid.
The price on sale or the coupon price is a market price..willing seller and buyer.
Who knows if the buyer would have bought the product at the non-coupon price to begin with.
The “price” of anything is the amount it actuall sells for. Everything else is just speculation.