I don't know, really. I'm naturally allergic to huge supermarkets. Normally, I do all my grocery shopping at the nearest chino, where I'm used to paying 8 pesos for a kilo of rice, 10 pesos for 2 kilos of tomatoes etc. But last week I went to a big one, looking for treats my chino doesn't have (caraway and some at least remotely spicy spice). Forgot the name of it but it was really big (near Castro Barros). They didn't seem to have anything my chino doesn't, just had everything in bigger amounts. The prices were insane though. Many products more than triple, compared to the local guy. Now I know what you mean by inflation
Thanks, I'll stick to my chino, who has the policy of minimum card payment 100 pesos and a 10% surcharge up to a certain amount.
And same goes for clothes, shoes or jewellery retailers (small ones). Some even have two different prices in the window, the efectivo one always being the lower. I would imagine that maybe these guys where I shop don't have the deals the big players enjoy?