Remember, the company is also paying for the equipment, paying to repair the equipment, paying to fuel the equipment, as well as paying you, paying taxes on you, workers comp, unempoyment insurance, and keeping the lights and phone on in the office.
The lawn shop I mechanic for does snow in the winter, just residential, and he takes in $1200 every time it snows 2"-4", of wich most goes to fuel and labor expenses.