Values in CalculatedShippingRate.WeightMajor and CalculatedShippingRate.WeightMinor are rounded up.

WeightMajor and WeightMinor are used to specify the weight of a shipping package. WeightMajor is used to specify the weight of the package in pounds (in US) or kilograms (all countries that use metric system). Although MeasureType is of decimal type, decimal values should not be used in WeightMajor and WeightMinor. If a shipping package was 5 pounds and 1.8 ounces, the 1.8 ounces should be rounded up to an even 2 ounces.