On january 1, 2013, a company sold a piece of equipment for $30,000 which it had used for several years. the equipment had cost $45,000, and its accumulated depreciation amounted to $20,000 at the time of the sale. what are the net effects on the accounting equation of selling the equipment?
a. assets and shareholders' equity increase $30,000.
b. assets and shareholders' equity increase $5,000.
c. assets and shareholders' equity decrease $5,000.
d. assets decrease and shareholders' equity increases $5,000