Which of the following represents storage cost?

The selection of rent, maintenance for storage, and wages for guards as the representation of storage cost is appropriate because storage costs typically encompass all expenses associated with holding and safeguarding inventory or materials.

Rent refers to the cost of the physical space used for storage, while maintenance includes any expenditures required to keep that space functional, such as repairs, utilities, and upkeep. Wages for guards represent the costs incurred to ensure the security and safety of the stored items, which is particularly important for preventing theft or damage. Collectively, these elements are fundamental to calculating the total costs associated with the storage of goods or materials in a sanitary engineering context, where the protection and proper management of stored materials can impact operational efficiency and safety.