If the lockout of dockworkers in Montreal persists, there will be "catastrophic" consequences for the Canadian economy, particularly in Quebec and Ontario, the local port authority warns. On Monday morning,

The employers' association at the Port of Montreal has issued the dockworkers' union a "final, comprehensive offer," threatening to lock out workers at 9 p.m. Sunday if a deal isn't reached.

Dock workers in both British Columbia and Montreal have now been locked out as negotiations stall between unions and employers. Here's what that means for Canadian consumers.