My first year in business is coming to an end and I've truly learned a lot this year due in part to the blunt honesty within these forums. Open honesty is not something you find within my day job as an educator, we typically walk on egg shells when offering criticism. With this in mind, I want to become better at bidding this coming year and for this I've been really trying to tally up my costs. I got a working equation that I need an opinion on Cost = 8.50x + .39m + .28(p) + x/24(Daily Overhead) x = hours m = Total miles to and from job p = Payout of Job The 8.50 is my cost for running my Scag ProV per hour, The .39 is the national average for costs to run a vehicle per mile, .28 is my tax rate, Daily Overhead is simply adding up all expenses to run your company per year and dividing it by 365. I'm missing the costs to trim, edge, blow, etc. Thoughts?