Final answer:
The question pertains to business, focusing on productivity and inventory management in the context of a company's stock levels. Without additional information, the numerical blanks in the policy cannot be accurately filled. The examples provided illustrate how productivity affects output and inventory.
Step-by-step explanation:
The question appears to be related to business, specifically within the context of productivity and inventory management.
Betty works in a company that manufactures shirts for school uniforms and has been handling the production department's budgets, which seems to involve having a policy related to stock levels. However, the question seems incomplete as it does not provide sufficient information to fill in the blanks with a numerical value. Without additional context about the stock policy, such as a specific number to represent an inventory measure or the units concerned, it is not possible to accurately complete the sentence.
If we consider the other provided information regarding productivity and the example of workers in the United States and Mexico producing shoes and refrigerators, we understand the importance of labor division and efficiency in production. This emphasizes how productivity can have a significant impact on a company's output and ability to manage inventory.