You can use any of these sources to find numbers on your retailer's financial performance. Standard & Poor's NetAdvantage may be the best source as the numbers are displayed in standard tables for all the companies.
If the company is public, look for the Annual Report to Shareholders on the company web site. It's often behind a link called Investor Relations or just Investors.
Unfortunately, in some cases the annual report might not be available in English!
If you can't find it on the web site or need an older annual report, see Other Sources for Annual Reports further down on this page.