6.1 Shekels
As metals are rare on Sinai, coins are made from bone, ivory, or
ceramic, with metal coins being on a level with gems and jewelry. The
standard trade unit is the Rephidim ceramic shekel -- one shekel is
equivalent to US$1 or one pound of grain, and half-shekels and
quarter-shekels are used for change.
Many tribes use carved bone and ivory coins -- the exchange rates for
these coins vary, usually five shekels to a simple bone token, but
ancient or intricately designed coins are worth a good deal to coin
collectors.
The standard Rephidim shekel is a ceramic piece inscribed with the face of
the present Astromancer and the date the coin was minted.
There are ceramic shekels with metal wire rims, in denominations of five (wire-edged), ten
(thick wire-edged), twenty (copper wire), and fifty (silver wire).
Iron coins were worth 500 shekels before the "Iron Crash", and then dropped to about 50,
but presently they're pretty much worthless except as curios. "Don't let him pay you in
iron" has become roughly akin to "Don't take any wooden nickels".
Copper coins are worth 100 shekels.
Silver coins are worth 1000 shekels.
Gold coins are worth 5000 shekels.
6.2 Income from Typical Jobs
The average person probably makes 20-30 shekels a day in a low-paying
job, 30-50 if they're highly trained crafters -- each of those ivory
craftings probably represents at least five days of work, not
including materials.
6.3 Costs of Typical Things
An average apartment rents for 20 shekels/day or 7300 shekels/year,
seven silver and three coppers.
Food for one person is 8 shekels/day for good food, or 2920 shekels --
three silvers per year.
Families wind up sharing rooms and being packed in fairly tightly.
6.4 Trade
Surface nations are largely self-sufficient but export their surpluses
to other nations in exchange for resources they find needful. These
include wood, food of various types, unique crafts, metals and gems
from mines, and medicines and spices grown only in certain areas. For
instance, the equatorial lands grow a great deal of xocholatl (a
chocolate-like substance, mildly poisonous to some species but still
in high demand for taste) and mateh (a general stimulant drink).