Actually this is a line from a film by Woody Allen that I watched some time ago and that got me wondering regardless of it being just for gags. So this is a serious question.
As a carpenter, how much would Jesus charge at that time and place to build a simple wood chair? Would he charge it in cash or would he accept something else for payment? Would he be assigned to a guild (or any kind of institution) that would impose specific prices, materials and such back on those days? Was he very sought as a carpenter? Is there any record on that?
Where or how do you gather the information for the cost of goods from this time era and the inflation of currency?