explain how you subtract the reamaining total from the 15% bracket to the 25% bracket. why WOULD NOT just do $160000 * 25%, then the remaining total *30%???

Country A levies an individual income tax with the following rate structure: Percentage Rote 10% 15 Brocket Income from 0 to $20,000 Income from $20,002 to $75,000 Income from $75,001 to $160,000 Income in excess of $160,000 25 30 Required: a. M. Levi's taxable income is $55,600. Compute his tax and average tax rate. What is Mr. Levi's marginal tax rate? b. Ms. Jinn's taxable income is $300,000. Compute her tax and average tax rate. What is Ms.Jinn's marginal tax rates Complete this question by entering your answers in the tabs below. Required A Required B Ms.Jinn's taxable income is $300,000. Compute her tax and average tax rate. What is Ms.Jinn's marginal tax rate? (Rou your percentage answers to 2 decimal places and other answer to the nearest dollar amount.) Ms. Jinn Income tax Average tax rate Marginal tax rate 30.00%