Practice Exercise 17-4 At December 31, 2017, the available-for-sale debt portfolio for Sage Corp. is as follows. Unrealized Gain (Loss) ecurities Cost Fair Value $29,900 $27,900 28,700 30,600 $(2,000) Good Co. Bonds Home Co. Bonds 1,900 44,000 Grand Inc. Debentures 42,900 1,100 101,500 102,500 1,000 Before an adjusting entry on December 31, 2017, the fair value adjustment account contained a credit balance of $510. Sage Corp. reported net income of $80,100 for 2017. Prepare the adjusting entry at December 31, 2017, to report the portfolio at fair value. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter o for the amounts.) Debit Credit Account Titles and Explanation