Problem 2-39 (LO.4) Tristan, who is single, operates three sole proprietorships that generate the following information in 2019 (none are "specified services" businesses). Business W-2 Wages Capital Investment $0 QBI $300,000 (135,000) 150,000 $90,000 60,000 B. O Tristan chooses not to aggregate the businesses. She also earns $150,000 of wages from an unrelated business, and her modified taxable income (before any QBI deduction) is $380,000. Assume the QBI amount is net of the self-employment tax deduction. a. What is Tristan's QBI deduction? Feedback b. Assume that Tristan can aggregate these businesses. Determine her QBI deduction if she decides to aggregate the businesses. IX