William Jones invested A$250,000 in the bonds of Woolworths Limited. He held them for 15 months, at the end of which he sold them for A$270,500. During the ownership period, he received A$20,000 interest. Calculate the pretax and after-tax HPR on William’s investment. Assume that he is in the 39.6% ordinary tax bracket and pays taxes on capital gains and interest at the ordinary income tax rate.