Start with the business
See’s sold a familiar consumer product. Buffett’s account focuses on the economics of running it, not just its sales.
Separate price from operating capital
The $25 million purchase price and $8 million operating capital describe different things. Do not use one in place of the other in a return calculation.
Ask what growth consumes
Our next research question: how much extra cash must remain in the business to maintain its position and expand? That is why the owner-earnings worksheet asks about maintenance spending.
This is a historical teaching case, not a current valuation. The purchase figures alone do not establish the return available to someone buying a business today.
Source: Berkshire Hathaway 2007 shareholder letter, printed pages 7–8 ↗