A company began the year with Assets of $106,000, Liabilities of $23,000 and Stockholders' equity of $83,000. During the year assets increased $55,600 and stockholders' equity increased $21,200. What was the change in liabilities for the year?

a) Increase of $76,800

b) Increase of $34,400

c) Decrease of $76,800

d) Decrease of $34,400