For a company that has lost $33 billion since 2019, a strike that virtually halts production of its major product is the last thing it needs. But that’s the reality for embattled aircraft maker Boeing.

The International Association of Machinists on Friday overwhelmingly voted to reject the offer that had been accepted by their leadership and Boeing.

Conventional wisdom holds that the longer a strike goes on, the more money a business will lose. For the Boeing Company, that could mean billions. According to estimates by Anderson Economic Group via the financial publication The Street, Boeing has already lost more than $570 million in the one week since its 33,000 machinists went out on strike.