Oddly enough, in Argentina supermarket prices are higher than at the small shops, which is opposite to what happens in Italy (and I suppose Europe-wide).
Veggies at Coto are much more expensive than in the fancy verduleria in downtown San Isidro, and Coto's quality is lower. It beats me why people buy veggies and fruits at the supermarket here in Argentina!
It is hard for me to keep track of veggie prices because in small shops they are not always shown - I guess they change too rapidly so they don't even bother. I can afford the luxury to buy whatever I want to buy. I just keep in mind that acelga is cheaper than espinacas, or that cebolla is cheaper than cebolla de verdeo or puerros, etc.
The local Al Campo store is always full of people, especially elderly people, and offers even lower prices (but for lower quality, usually, and there are huge displays where everybody touches everything, so I personally don't shop there).
When I arrived here I thought about making my own jam by buying large quantities of fruit, but it turned out it is more expensive than buying artisanal jams for around 35-40 ARS/jar.
Anyway, I was surprised to find prices basically unchanged in Italy after a year. Chocolate is so inexpensive over there, and used to consider it expensive when I lived in Italy! But here to find a decent chocolate you have to shop artisanally, paying 50 g of chocolate what in Europe would buy you a 300 g bar of Lindtt at the supermarket!
So yes, Argentina is so damn expensive as far as food goes, and the quality is much lower.
Regarding the price of clothes I wouldn't be that critical. Clothes in Europe are so cheap because they come from Asian sweatshops, so they don't carry a fair price tag, just a cheap one. Of course, this leaves unchanged the fact that in Argentina clothes are in general rubbish - I wouldn't use the price of sweatshop-produced goods as a benchmark.