ok, another one of bobbys believe it or not scenerios. customer is due for cutting every sat. she calls friday:"my son bought a new lawnmower, and brought it over to show me. i asked him to cut the lawn, so maybe i could give u a "break", well, half way through the front, the thing broke down. when u come tommorow, u only need to mow half the front, and the whole back yard. so, since the front(2000sq ft) is half mowed, how much will it be? not the usual $30 for this visit, i figure u would charge maybe $20?" when does this madness ever end? im dying to hear, what would u do?