Of course, the point of Question 1 is not just practice in revenue and expense matching calculations, but thinking about which is the most appropriate method. For tax purposes, Grey will want to use the collection method. For evaluating the performance of the farm in 2005, the production method would seem most useful. This is because there is very little uncertainty concerning the eventual sale of the 30,000-bushel wheat inventory stored at the farm. This inventory exists, not because there are no customers for it, but because the farm manager chose not to sell it, speculating that future prices will be higher. This is the same reasoning that justifies the unusual revenue recognition method as GAAP; the same method is also allowed for precious metals and other minerals where immediate marketability at quoted prices obtains. Also, many professional service firms (e.g., accounting firms) recognize revenue as work is performed by recording jobs in progress at billing rates rather than at cost. The name Unbilled Receivables is often used for this account to emphasize that the revenue has already been recognized, even though it has not yet been billed.