Most of the work that I do the work comes to me and if I do have to go to the job I only have go at the most 10 miles one way and I just add a little for gas. A job that is about 75 miles one way came up there will be about $75 worth of supply's and parts. My question is what is a fair millage charge? I there is not enough markup in the parts and supplied to cover any of the travel expense.