Accounting for Marketable Debt Securities Tim Propp, CFO of Thunderbird, Inc., invested some of the firm's excess cash in the debt of three companies. At year-end, he reviewed how the portfolio of securities had done. Security Name Microsoft Corporation Pfizer, Inc. Boeing, Inc. Fair Value Cost Basis at Year-End Classification $100,000 $122,000 Trading security 75,000 73,000 Trading security 50,000 48,000 Available-for-sale security $225,000 $243,000 Required 1. Calculate the value that would be assigned to the portfolio of securities on Thunderbird's balance sheet at year-end. $ 243,000 2. Calculate the income statement effect of the portfolio of securities at year-end. $ 18,000 X Unrealized Gain