I think that any further claims to mowing production should include: size and type of mowers used, conditions of lawn (are they usually wet?, type of grass, how infested with weeds are they? etc.), size of lawns, amount of trimming per lawn, amount of edging per lawn, amount of blowing needed, height of cut, how much grass you're cutting off, amount of money you make per cut, distance traveled between cuts, type of cut (are you roundy rounding, stripeing square, stripeing on an angle?) and (and this is an important one) quality of cut when finished. Are your lines straight? Did you leave sprigs of grass sticking up everywhere?