@marcho: it was posted somewhere before, and I don't remember the real numbers, but you'll understand how training works with example below:
25% of monster's
deaths, the monster will drop something.
scavenger increase this rate.
10% of the
drops are equipments, and 1% of artifacts, rest other items.
quartermaster, and archaeologist increase the correspondent rates.
So if I have already 10 levels of scavenger , and 3 archaeologist:
1.2*1.3=1.56 In other words more 56% to artifacts to drop.
adding the 4th level:
1.2*1.4=1.68 In other words more 68% to artifacts to drop.
QUOTE(sushi0 @ Dec 24 2010, 03:45)

He's going from 3rd level of archaeologist to 4th level. If he does indeed have 10 levels of scavenger, it would boost his drop by 20% regardless so that cancels out. Your idiocy amazes me more and more each day. /rolleyes
Ok that's what I get for reading posts at this time of day, and for that post of mine I apologize. However you already proved your idiocy more than once, and the refusal to admit you're wrong, so that's why I posted like that.
Moving on, now time to correct your math, because yes, it's still wrong:
58,950C was the amount of credits to pay the 4th level.
9,000C per artifact.
This means you need to get 58,950/9000=6.55
extra artifacts to pay the training.
x - represent the number of artifacts you would get with 0 archaeologist in a y (this is a constant) number of drops.
x*1.4-x*1.3 = 6.55
x= 65.5 artifacts
But since you have 4 archaeologist this actually represent 65.5*1.4=91.7 artifacts.
So it's only after 92 artifacts dropped you "pay" the training,
not 66.