How do you charge by the hour for fertilizing? I charge by the square foot.
A 20k square feet lawn takes about 30 minutes. I charge $79. Using your formula I'd only get $15 putting down $40 of material.
That should only take about 2 minutes.
Well this shows my lack of experience. I've only done small yards so far. If it is something that big then yes will be more money and I guess it wouldn't be by the hour. When I say 20 minutes to do that I'm adding in the time for me to go get fertilizer, etc.. I don't store anything in my garage as it is crowded enough with equipment.
I use a simple Scotts spreader. What do you use if it is a 11k s.f. lawn?