Next, costs involved in operating the business are SG&A. This category includes marketing, salaries, utility bills, technology expenses and other general costs associated with running a business. SG&A also includes depreciation and amortization. Companies must include the cost of replacing worn out assets. Remember, some corporate expenses, such as research and development (R&D) at technology companies, are crucial to future growth and should not be cut, even though doing so may make for a better-looking earnings report. Finally, there are financial costs, notably taxes and interest payments, which need to be considered.