I know that this is a common thread but I want to post this anyway. My problem is that I have a good customer, but a very picky customer on a 20k/yr landscape contract that was bid in January, I have been adding a 3.5% surcharge to the invoices and I received a call today because they don't understand "why" they are getting surcharged, that they don't see how we use that much fuel on their property. I can understand the question of "how" we come up with the percentage but not the "why"!! Everything we do revolves around pertroleum. I have several other contracts like this that there have been no problems or questions, I have even had some customers say"3.5% is that i?" Any suggestions on how to handle this?