Hannah contributed $300 per month into her retirement account in pre-tax dollars during the last tax year. Her taxable income for the year was $72,000. She files taxes as a single taxpayer.
a. What would her taxable income have been had she contributed to the account in after-tax dollars?
b. Use the tax tables below to calculate her tax in both the pre-tax and after-tax contribution situations.

c. How much did Hannah save in taxes during that year?

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