Rationale
Machine maintenance, lease on factory, and plant supervisor salary are window costs.
Window costs refer to the fixed costs that are necessary for the general operation of a business but do not directly contribute to the production of goods. In this case, the plant supervisor's salary, machine maintenance, and lease on the factory are essential for maintaining operations, regardless of the production volume.
A) Lumber, production worker wages, and machine maintenance
This option incorrectly includes lumber, which is a direct material cost associated with production. Additionally, production worker wages are variable costs that fluctuate with production levels, making them unsuitable for classification as window costs.
B) Production worker wages, machine maintenance, and lease on factory
While machine maintenance and lease on the factory are window costs, production worker wages are not. They are variable costs that change based on the number of hours worked or the amount produced, thus not fitting the definition of window costs.
C) Plant supervisor salary, lumber, and production worker wages
This choice includes the plant supervisor salary, which is a window cost, but it also lists lumber and production worker wages, both of which are direct costs tied to production. Therefore, this option does not accurately represent the required window costs.
D) Machine maintenance, lease on factory, and plant supervisor salary
This selection correctly identifies all three costs as window costs. The plant supervisor salary and lease on the factory are fixed costs, while machine maintenance is essential for keeping operations running smoothly, making them appropriate examples of window costs.
Conclusion
Window costs are defined as necessary expenses that do not vary with production levels and are vital for the overall operations of a business. In this scenario, machine maintenance, the lease on the factory, and the plant supervisor's salary collectively exemplify window costs, as they support the business's infrastructure without directly influencing production output.
