Do some research and buy a legal for trade price computing scale that can be certified by the state.  In most states it is a requirement.  However, sometimes due to budget restraints and manpower, merchants get the idea that they can get away with not purchasing a legal for trade scale.  Sometimes every now and then you hear comments from sellers of fruit and vegetables who sell produce at farmers markets, that they don’t worry about bending the rules of the State Weights and Measures Department.  The thought process basically being, “we are not a priority for the Department of Agriculture.”  Need proof, take a look at the article below