The strike at Boeing by 33,000 members of the International Association of Machinists union, which reaches its seventh day today, has already cost the company and workers $572 million, according to an estimate from Anderson Economic Group.

Boeing's U.S. West Coast factory workers walked off the job on Friday after overwhelmingly rejecting a contract deal, halting production of the planemaker's strongest-selling model and sending shares down over 2%.

Boeing has started rolling furloughs of nonunion employees as a week-old labor strike by 33,000 union machinists shows no signs of ending