Answer:
The marginal tax rate on this income is 24%
The marginal tax rate in the income tax rate being charged upon the taxable income which is additional to the actual income earned from the business operations or services provided.
Explanation:
The marginal tax rate is computed as follows:
The new taxable income of the taxpayer is
[tex]\\$78,300+$30,000\\=$118,300[/tex]
As per US tax rate schedule if the taxable income is under the slab of $86,375 to $118,300, then the tax rate will be 24%, were the income will be $31,925.