Katherine Brewer is the stockholder and operator of Our Idol LLC, a motivational consulting business. At the end of its accounting period, December 31, 2017, Our Idol has assets of $574,000 and liabilities of $138,000. Using the accounting equation, determine the following amounts:

Stockholders' equity as of December 31, 2017?

Stockholders' equity as of December 31, 2018, assuming that assets increased by $109,000 and liabilities decreased by $33,000 during 2018?