oh barf.

Arnold builds fences in his spare time. Good quality plywood costs $4.00 per square foot. There is approximately a 5% waste of material due to cutting and fitting. He also figures $250 per month for finishing material, glue, tools, etc. If he charges $10.10 per square foot of finished product, how many square feet of plywood did he buy originally if his profit is $219.98 in one month?

I do not know. 

Nor do I care to find out.