13)On December 31, 2018,M Co acquired 100% ownership of S Co. On that date, S reported assets and liabilities with book values of $300,000 and $100,000, respectively, common stock outstanding of $50,000, and retained earnings of $150,000. The book values and fair values of S assets and liabilities were equal except for land which had increased in value by $10,000 and inventories which had decreased by $10,000

Based on the preceding information,what amount of goodwill balance immediately after the business combination,if the acquisition price was $240,000