Jan Petri is the stockholder and operator of You're A Star LLC, a motivational consulting business. At the end of its accounting period, December 31, 2017, You're A Star has assets of $891,000 and liabilities of $214,000. Using the accounting equation, determine the following amounts:

a. Stockholders' equity as of December 31, 2017.

b. Stockholders' equity as of December 31, 2018, assuming that assets increased by $169,000 and liabilities increased by $51,000 during 2018.