The Total Sales field is a useful measure of a company’s size. It represents the sum of revenue from all of a company’s operating activities after deducting any sales adjustments over the last 12 months. This field is measured on a trailing twelve month basis and has been translated to British Pounds Sterling for all companies.
The sales figure gives a sense for the scale of a company, although companies can have very different profit margins depending on the industry and state of the business, so this may not bear much relation to the earnings figure. Some however argue for the importance of sales, since sales figures are less easy to manipulate than either earnings or book value.