Peru's most expensive cities

well the most expensive city to live in ,,depends on what class of accomodation you want..obviously in the best barrios of lima..
but as for the city with the highest cost of living,,well thats iquitos..basicaly because most the food and goods have to be brought up river by boat,or brought in by aeroplane..
in trujillo i found food and the general cost of living much cheaper than lima for example.. but one of the strangest things iv found is that most fruit & vegetable  products,,produced here in the jungle,,are actually cheaper on the coast than here in iquitos !!!!
its absurd but many things are like that in peru.. another example was cigarettes,in many shops it was cheaper to buy two packs of ten,, than to buy one pack of twenty..its absurd ! but its true.