I live in Pernambuco - the 3rd most popular NE state with tourists after Bahia and Ceara, well ahead of RN - and do not pay anything like these prices. For example -

I drive a 1600cc 16V car which is flex, so I can use petrol or alcool. Alcool is between 1.35 & 1.55 per litre. I buy all my fruit, salad and veg from a local market, and can get between 1 and 4 pineapples for R$1 depending on size. (Apparently it does matter with pineapples!)

I live in a large 400+ sq m detached house on the beach on a double lot. It is a work in progress, but my electric is R$250-350 per month, my IPTU totalled R$420 this year but I got a 20% discount off that by paying before 31st Jan.

Supermarket milk is R$1.49 (city, about 1 hour away) or R$1.89 from local shop. A whole fillet mignon from a city supermarket costs R$24-30, trimmed and that is the most expensive, but cuts into 6+ steaks. Good sized fresh whole prawns are delivered to my door for R$10-12 per kilo.

However anything that has been imported is very expensive due to the heavy taxes importation brings. If I am sent a parcel by airmail, it is opened by customs who then charge me 60% of whatever value they place on it plus 60% of the postage or shipping costs! If I do not pay it is destroyed.

Our medical insurance is acually R$200-250 per month per person, as we have been here less than 1 year, and we have the top cover. I do have a caretaker who I pay R$460 per month (x13).

I agree with Michael about wine (unfortunately). Brazil makes quite good sparkling wines, but only reasonable sweet and rubbish dry wines. The only reasonably priced semi-dry red wine I would recommend is Saint Germain Merlot at between R$7.50 and R$9.50 per bottle.