What is an avoirdupois ounce?
An avoirdupois ounce is the ordinary ounce of the imperial and US customary systems, as opposed to the troy ounce used for gold and silver.
It is equal to 1/16 of a pound or approximately 28.35 grams. The avoirdupois system is based on a pound of 16 ounces, with larger units such as tons and pounds used for heavier measurements.
What is a short hundredweight?
A short hundredweight, also known as a cental, is a unit of weight commonly used in the United States and Canada.
It is equivalent to 100 pounds or approximately 45.36 kilograms.
The term "short" is used to distinguish it from the long hundredweight, which is used in the United Kingdom and equals 112 pounds.