What does stamp credit assigned to clerks include?

Stamp credit assigned to clerks includes both stamp stock and cash because it represents the total financial responsibility and accountability of clerks handling postage stamps. This system is crucial for tracking the value of stamps that clerks are provided with for sale to customers. The inclusion of stamp stock allows clerks to have an inventory of stamps that they can sell, while cash reflects the payments collected for those stamps. This dual component ensures all transactions are accurately accounted for and provides a reliable method for balancing sales and inventory.

Other options do not encompass the full definition of stamp credit. For example, cash alone would not account for the physical stamps that clerks are responsible for selling, and merely including postage bills or shipping boxes does not align with the functions associated with managing stamp inventory. Hence, the selection of both stamp stock and cash correctly illustrates the comprehensive nature of stamp credit assigned to clerks.