Financial Review of Definitions Great work! Here is a summary of the key definitions: Operating revenue Operating revenue is the revenue generated from a company's primary business activities. For example, a retailer produces revenue through merchandise sales, and a physician derives revenue from the medical services he/she provides. Operating expense An operating expense is an expense a business incurs through its normal business operations. Often abbreviated as OPEX, operating expenses include rent, equipment, inventory costs, marketing, payroll, insurance, step costs, and funds allocated for research and development EBITDA A company's Earnings Before Interest, Taxes, Depreciation, and Amortization is an accounting measure calculated using a company's earnings, before interest expenses, taxes, depreciation, and amortization are subtracted, as a proxy for a company's current operating profitability. EBITDA Margins EBITDA margin is a measure of a company's operating...