In an effort to track my time and get a exact cost per hour I kept up with where I spent my time so far this week. The following is a monday - thursday lunch. Work hours - 27.9 (this is the time from trailer hook up to trailer drop off) truck hours - 8.3 (I kept up with the hour meter on my truck. Assuming this is the time the truck was running) drink/gas hours - 2 (estimated number 2 drink stops per day and a gas fill up) After all that it leaves only 17.6 hour of actual mow/trim/blow time!! So you guys figuring up your cost this is a good example of work hours versus billable hours.