Problem $1-37($LO $1-3)($Algo$)$

Campbell, a single taxpayer, earns $$403,500$ in taxable income and $$2,280$ in interest from an investment

in State of New York bonds. $($Use the U$.$S$.$ tax rate schedule$).$

Required:

a$.$ If Campbell earns an additional $$15,700$ of taxable income, what is her marginal tax rate on this

income?

b$.$ What is her marginal rate if$,$ instead, she had $$15,700$ of additional deductions?

$($For all requirements, do not round intermediate calculations. Round percentage answers to whole

percent.$)$