Which of these categorization methods can help track income and expense transactions by function?

The categorization method that helps track income and expense transactions by function is Classes. Classes in accounting software enable users to categorize transactions into various functional areas, such as departments, locations, or any other criterion that makes sense for tracking purposes. This allows for a detailed analysis of financial performance across different segments of the business.

When classes are assigned to transactions, it provides insight into how each segment is performing financially. For instance, if a business operates in multiple regions or offers different services, classes can help segregate income and expenses accordingly. This enhances reporting capabilities, allowing a clearer view of profitability and operational efficiency by function.

In contrast, sub-customers typically relate to tracking sales or expenses specifically for clients that fall under a parent organization. Paging in reports refers to how information is displayed on various pages of a report, impacting readability but not necessarily providing functional categorization. Projects are more focused on tracking income and expenses related to specific projects rather than general functions within the business. Therefore, classes are the best choice for this purpose, facilitating comprehensive income and expense tracking by functional categories.