What are Apple's primary expenses, secondary expenses, financial activity generated expenses, and losses 2023.

• What is the revenue trend? Does the 10-K or 10-Q discuss primary revenues and other revenue types?
• What do the accounting policies say in the annual report (footnotes) regarding the cost of revenue? What are the drivers to the cost of revenue and the trends?
• Are there any trends in sales and marketing expenses or research and development? Are these amounts reasonable for the type of business?
• Compare general and administrative expenses to similar companies. Are they reasonable?
• What is the ratio of net interest income (expense) to income from operations? Is this a safe ratio for the company? Why or why not?
• What is the income taxes trend? Is the effective tax rate reasonable over time?