Answer:
Mary's income:
Mary's adjusted gross income:
Mary's exemption + itemized deduction = $4,000 + $7,500 = $11,500
*since we are not given the table containing the tax bracket, I will use the current 2019 tax brackets:
A) taxable income = $139,800 - $12,200 = $127,600 + $15,000 (capital gains 15%)
federal tax liability = [$14,382.50 + 24% x ($127,600 - $84,200)] + ($15,000 x 15%) = ($14,382.50 + $10,416) + $2,250 = $24,798.50 + $2,250 = $27,048.50
B) Mary's marginal tax rate is 24%
C) Mary's average tax rate = $24,798.50 / $127,600 = 19.43%