The victims have been named locally as 17-year-olds Dom Ansah and Ben Gillham-Rice.
Two men were also injured in the incident.
The teenager was on a train from London to Milton Keynes when the incident happened.
A council-run cremation can cost anything from £364 to £960.
The body of the 19-year-old from Milton Keynes has yet to be found.
Photographs show 'significant damage'.
The company has already shut 17 stores and plans to close around 23 more.
Co-op have already started using the robot to deliver shopping.
And tenants are paying twice as much.