Answer:
Luke's net tax due or refund is $2,900
Explanation:
In order to calculate Luke's net tax due or refund we would have to make the following calculation:
Luke's net tax due or refund=Luke's non refundable credit+income taxes withheld from his salary
Luke's non refundable credit=non refundable personal tax credit-gross tax liability
Luke's non refundable credit=$2,400-$1,800
Luke's non refundable credit=$600
Therefore, Luke's net tax due or refund=$600+$2,300
Luke's net tax due or refund=$2,900
Luke's net tax due or refund is $2,900