If marginal revenue is negative, then total revenue falls as additional units are produced and sold. This generally happens when a company needs to cut prices significantly to sell the units produced.

How to calculate total revenue growth. ... If you're going to become an investor, there are a few things you should know — like these formulas. Keep reading to learn more.

Microsoft’s net profit margin is calculated by dividing its total net income of $24.7 billion by its net sales (total revenue) of $65.6 billion and multiplying that figure by 100.