During the year ended 30 June 2015 Barry Ltd, pays quarterly tax installments as follows: $4000 on 28 October 2014 $11 000 on 28 February 2015 $12 000 on 28 April 2015 On 30 June 2015, Barry Ltd determines its total current tax liability for the year to be $33 000. The final tax installment for the year will be: a. a refund of $2000 b. a payment of $33 000 Oc. a payment of $12 000 d. a payment of $6000