Katie, a single taxpayer, is a shareholder in Engineers One, a civil engineering company. This year, Katie’s share of net business income from Engineers One is $200,000. Assume that Katie’s allocation of wages paid by Engineers One to its employees is $300,000 and her allocation of Engineers One’s qualified property is $150,000 (unadjusted basis of equipment, all purchased within past three years).
Assume Katie has no other business income, no capital gains or qualified dividends, and that her taxable income before the deduction for qualified business income is $400,000. 

a. Calculate Katie’s deduction for qualified business income.

b. Assume the same facts as earlier, except Katie’s net business income from Engineers One is $400,000 and taxable income before the deduction for qualified business income is $350,000.