
My fees are usually calculated by the page (double-spaced, 12pt TNR font w/1" margins). I am very generous when calculating my fees, and never include white space, tables, graphs, formulas, or anything else that I'm not actively editing, so the fee I present is always the lowest it can be. I typically require half the agreed-upon payment up front, and the other half upon completion, but am flexible enough to work out a payment plan if it's absolutely necessary.