There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements. CROSS SECTION shows Earth's structure.
â The operating margin was an especially useful metric or ratio during the meeting as we wanted the discussion to include revenue statistics.
Operating Income = (Price X #Units Sold)- (Variable Cost Per Unit X Number of Units Sold) - Total Fixed Costs. Gross Margin vs Contribution Margin. It is important for a financial manager to understand that, on the income statement, the gross profit margin and the contribution margin are not the same. The gross profit margin is the difference between sales and cost of goods sold.