Inflation in Fiji has reduced in recent years and for the four months ended January 2015 was less than 0.3%.. Expect to pay prices similar to those of Australia in tourist regions.
In Fiji the currency is the Fijian dollar - symbolized as FJD placed before the amount with no intervening space. Bills include: FJD5, FJD10, FJD20, FJD50. Coins include: 5 cents, 10 cents, 20 cents, 50 cents, $1, $2.
Be aware when going to local markets, often some of the stall holders family will be outside on the lookout for travellers, and will escort the travellers inside using the guise of "getting the best bargains". Once inside they, and their relatives who own the stall, can become quite aggressive if the traveller does not buy their products. Be firm, tell them that you will report them to the authorities if they do not leave you alone. They will quickly change their tone and back down.