On January 1, 2021, total assets for Blazer Technologies were $165,000; on December 31, 2021, total assets were $190,000. On January 1, 2021, total liabilities were $120,000; on December 31, 2021, total liabilities were $135,000. What is the amount of the change and the direction of the change in Blazer Technologies' stockholders' equity for 2021? decrease of $15,000 increase of $10,000 increase of $15,000 decrease of $10,000