ok, a customer calls, and wants stone put in. u measure, do the math, u tell them they need 10 ton, at $140 a ton. halfway through the job, u say, uh o....something is wrong. u muffed the numbers up, some how, some way, u screwed up. u need 13 ton to finish the job. do u tell the client u need extra stone, and it will cost more? or do u just buy it, finish, and not say a word?