Final answer:
The Residue Calculator is a tool used by Stock Control checkers to determine the correct amount of residue a unit should return, which aids in efficient inventory management.
Step-by-step explanation:
One tool that helps the Stock Control checker determine how much residue a unit should return is the Residue Calculator. This tool takes into account various factors such as the current stock levels, usage patterns, and future projections to provide an accurate estimate of the residue that needs to be returned. By using this tool, businesses can be more efficient in managing their inventory, ensuring that excess materials are returned, or disposed of, in a timely and proper manner. The Residue Calculator is a part of inventory management systems and is important for maintaining stock accuracy and reducing waste.