The cost of living in Pompeii seems to have been relatively low.
The Roman currency was comprised of coins which included asses (copper), dupondii (bronze), sestertii (bronze), denarii (silver) and aurei (gold).
Other denominations used were the quadrans, the quinarius argenteus and the quinarius aureus.
According to the sums of money found on the bodies of its inhabitants, Pompeii had some wealthy citizens.
Some examples of basic costs are
A measure of ordinary wine 1as
A loaf of bread 2 asses
A pound (0.33kg) of oil 2 dupondii
A modius (6.5kg) of wheat 15 dupondii
Pot 1 as
Plate 1 as
Drinking cup 2 asses
Laundering a tunic 4 sestertii
A new tunic 15 sestertii
1 mule 130 denarii
1 slave 630 denarii