As the others have said there will be no import duty but there's a big variation in shipping costs (and times) depending on the company.

I've once had TOLL charge a 'customs processing fee' on top of shipping (ie. not money to the govt but to TOLL for arranging for our stuff to be reviewed by customs or some other bull****) but that was for a very large package with lots of different stuff in it and they agreed to waive the fee as we weren't warned about it beforehand.