How to Calculate Profit Margin With Only Sales and Net Loss. A company's profit margin reveals how much of its earnings it gets to keep after it pays all of its expenses.

Find out more about the forward price to earnings ratio and how to calculate the forward price to earnings ratios of companies in Microsoft Excel.

Find out more about the return on assets (ROA) ratio and the formula for calculating a company's return on assets in Excel.

Calculating the return One of the best methods for calculating an average return for a stock investment is the XIRR function in Excel.