This year Luke has calculated his gross tax liability at $2,000. Luke is entitled to a $2,700 nonrefundable personal tax credit, a $1,650 business tax credit, and a $700 refundable personal tax credit. In addition, Luke has had $2,550 of income taxes withheld from his salary.

What is Luke's net tax due or refund?

Note: Input the amount as a positive value.