4. Marsha is filing her federal income tax return with the Single filing status. She had an adjusted gross income of $56,800 last year and is trying to decide whether to take the standard deduction of

4. Marsha is filing her federal income tax return with the Single filing status. She had an adjusted gross income of $56,800 last year and is trying to decide whether to take the standard deduction of $5700 or to itemize deductions. Last year she had $4900 in medical expenses, $3100 in state and local income taxes paid, $1940 in mortgage interest paid, $530 in charitable contributions, and $1200 in non-reimbursed work expenses. (7 points: Part I - 1 point; Part II - 2 points; Part III - 1 point; Part IV - 1 point; Part V - 2 points)

Part I: If medical expenses are deductible to the extent that they exceed 7.5% of a taxpayer's AGI, how much will Marsha be able to deduct for medical expenses if she itemizes deductions?