We work in close cooperation with State Division and National Bureau of Standards on all matters. Watch the scale and learn to read scale indicators. The scale must start at zero before weighing. Don't be fooled by the size of the package. Your main concern is the net weight of the goods inside.
Net weight means the weight without the wrapping.
You do not pay for paper. Read all labels on all packages. Learn to compute cost per ounce to get full value for your money. Demand accurate weight and measurements in all purchases just as you demand accurate change from a cashier. All meters start at zero, too.