If total assets decreased by $30,000 during a specific period and stockholders' equity decreased by $35,000 during the same period, the period's change in total liabilities was a $65,000 increase.

This is incorrect. If total assets decreased by $30,000 and stockholders' equity decreased by $35,000, there is a total decrease of $65,000. Therefore, the change in total liabilities can be calculated using the accounting equation: Assets = Liabilities + Stockholders' Equity. Rearranging that equation, Liabilities = Assets - Stockholders' Equity. If there was a decrease of $65,000 in the left side of the equation (assets - stockholders' equity), there must have also been a decrease of $65,000 in the right side of the equation (liabilities). Therefore, the period's change in total liabilities was a $65,000 decrease.