I think it would be extremely optimistic to expect the dollar would gain that much value.
Many things in Argentina have been very cheap, by world standards, for years.
The end of the cepo means that some things will simply go up in cost.
Some of this will be because subsidies are dropped.
Other things will respond to world commodity prices, to more imports, and to vagaries of the argentine economy.
Ambev buys Quilmes, beer prices go up. Ambev is Brazilian/Belgian, dollars got nothing to do with it.
Many new microbrews hit the streets from local breweries, who routinely charge 40 pesos for a 333cc bottle.
Quilmes says- we are leaving money on the table selling liters for 20 pesos.
Subsidized argentine factories, which made relatively inexpensive items, are losing subsidies under Macri.
I just heard yesterday of a weaving co-op that may not be able to afford to buy materials.
Imports will replace them on the shelves, but will not be cheap.
Import taxes have not been dropped, import expenses, both black and white, are not going down.
If a local company can more easily export, say, Malbec, or belt sanders, or high fashion garments, and get world prices, they will also raise local prices.
There are many, many, more things going on here beyond the dollar/peso exchange rate.