45. Arrange these sentences into a good order!

1) First, you must ask for the form for sending package from the post office employee on duty.
2) Lastly, submit the package at the window
3) Have the package weighed to decide the postal fee.
4) Dont forget to sign the form.
5) After that, fill the form completely.
6) Ok friends, I want to tell you how to send a package
7) If you have any difficulties, ask someone for help.
==$S==​

45. Arrange these sentences into a good order!