Fine, I'll be the racist.
A big difference between the Western world and Eastern is, in the East it is always acceptable to rip off a customer. It's always a buyer beware situation. If someone is dumb enough to pay $2 for something most people pay .75 for, what's the loss anyway?
And just to be a little more racist, I have had a huge problem over my life with Indians short changing me in convenience stores. Almost every time, it is missing singles in a change return.
In your store owners defense, promotions like this are performed by vendors, and often even the owner of the company has no idea there is some kind of sale going on in his store. They too, are very sneaky people (I once had a Pepsi vendor try to trick me into buying $700 more soda than I had ordered).