Conrad received a salary of $140,000 in 2020. He earned interest of $10,000 on City of Charlotte bonds. He had no income other than his salary and interest. He files as a single person and claims the standard deduction What is his income tax liability before credits? O $19,904 $24,704 O $ 23,240 $ 23,459 John and his wife have adjusted gross income of $260,000, which includes investment income of $20,000. John and his wife hle a joint return. How much is their extra tax on net investment income? $380 $900 O $570 $760