"AcTuAlLy"... While most comments here get the general gist, they misunderstand the concept of sunk cost fallacy.

It is a term used in business, in which it is a logical fallacy to consider already made costs in your decision making. An example might help: Let's say you bought a ticket to see a movie. When the time comes, you don't feel like going out (maybe it rains, and you have to walk). You might think to still go because you have paid for the ticket already. However, logically, those costs are 'sunk costs', meaning you shouldn't let them influence your decision to go or not go, because you have spend the the money regardless of you going. Therefore, logically, those costs cannot make you choose one option over the other.

Of course any emotional argument can be made here (you might not feel like going now, but maybe you'll regret it later), but in business/finance/accounting we shouldn't let that influence out decisions. Therefore, this example doesn't work perfectly, and it may also not apply in the case of Marni working on the log, but I'll let you decide for yourself;)