If you plan on staying, get yourself a savings account (even if it's only to use the account for chopping) from HSBC or Banco Galicia, or a bank that usually has anywhere from 10 - 20% discount with their debit or credit cards.
[for example: Coto offers 20% discount with HSBC credit Visa/MC cards on fridays, and 10% with all other debit cards]
Really, you notice the few hundred pesos in savings at checkout or in your monthly statement. This, at least, has helped in offsetting the rise in prices.
There are sporadic price increases at different times of the year (not really associated with seasonal things, but more because of skirmishes between different unions and such). Like the time when tomatoes shot up from 3pesos to 18pesos per kilo a couple of years ago, then lettuce.They drop the price back... but this kind of thing does occur.
There is food; you are not going to see "bread lines" and massive rationing... at least not yet

. Anyways, you can save a lot of money if you don't buy everything in one supermarket. Often you will find some things are cheaper in the local "chinos", and somethings are not. Jumbo is more expensive than Coto but has better meats and more variety and imported stuff.
A little bit of research and you can reduce costs during this time of inflation.