Calculate the 2020 total tax for Gordon​ Geist, a single taxpayer without dependents and no itemized deductions. He has an active income of ​$42 comma 000​, a​ short-term capital gain income of ​$3 comma 200 from the sale of​ stock, and ​$6 comma 000 from book royalties. What is​ Gordon's average tax rate on his overall​ (total) income?