These are the categories that are listed above each piece of equipment I use. Ive been scouring over the posts and replies for overhead but still have questions. I have an idea of what I call "running cost" runs me, which is the cost of the equipment divided by the lifespan of the machine in hrs <check>. Its been a while since I did the maintenance cost and gas costs per hr/per machine so I could use a hand with figuring that part out. Does anyone calculate their "maintence cost" just like their "running cost"?