Calculation of total liabilities at the end of the year:
To calculate total liabilities at the end of the year we need to calculate stockholders' equity at the end of the year as follows:
Stockholders' equity at the end of the year = stockholders' equity at the beginning of the year + Net Income – Dividends
Stockholders' equity at the end of the year = 40,000+90,000-20,000
Stockholders' equity at the end of the year = $110,000
Now using the accounting equation we can calculate total liabilities at the end of the year as follows;
Liabilities = Assets - Stockholders' equity
Liabilities = 215000-110000
Liabilities = 105000
Hence, total liabilities at the end of the year are $105,000