Final answer:
The use of group items when tracking quantity on hand or quantity sold is true. These units, such as dozens or reams, standardize inventory management and facilitate an accurate count of stock in various business and scientific settings.
Step-by-step explanation:
The statement that group items are used when tracking quantity on hand or quantity sold is true. Group items refer to units of items that are commonly used to quantify and track inventory in a standardized manner. Using specific units like a dozen, a six-pack, or a ream helps simplify inventory management and sales tracking, ensuring that businesses can easily quantify how much stock is on hand or how much has been sold. In various settings, from grocery stores to office supplies, these group units play a critical role in maintaining organized records of quantities. For instance, a store would use 'dozen' when referring to eggs, or 'ream' for printer paper, to standardize the count and simplify the accounting or stocking processes.
Furthermore, this concept is not only utilized in retail settings but is also adapted in scientific fields to count exceptionally large or small quantities, such as atoms using the mole unit.