What is the adv for groceries?
Because it is a big tourist area and an Island separated from any large city by the continental divide, stuff is not cheap. It is not as expensive as Costa Rica but some things are on par with the U.S. I am not sure if your question is about the price of things or about where to get things, but there are dozens of stores that sell pretty much the same thing and pretty much the same price. You can spend hours going from store to store to save 10 cents on this or that. Eggs are 25 cents each, beers in the stores 70 and 75 cents or sometimes less if you are buying cases of bottles, bread depends on brand but around 1.75 a loaf, juice it depeneds but any juice without sugar (tropicana) will be expensive.
Prices for basic items such as milk, bread eggs, 22 items in total are price controlled by the government so will be virtually the same price place to place. For other items, in general the bigger stores El Rey, Super 99, Xtra Foods, Machetazo etc. will be cheaper as they can buy in bulk where the other stores can't. But the biggest difference will be in whether you buy local brands or imported brands of the same items. For example if you buy a 1/2 litre tub of the local ice cream you will pay around $3 if you want the same size of Breyers you will be plunking down close to $10. Breyers is a bit better quality but not 300% better.
There are no big super markets such as 99, Rey, Xtra, etc etc. Only small Chinos (chinese but it means store)
How much six pack local bee or liter vodka? Eggs and bread?