A company reported total assets at the end of 2017 of $95,000: including cash of $35,000, accounts receivable of $20,000, and inventory of $40,000. It reported total assets at the end of 2018 of $110,000; including cash of $44,000; accounts receivable of $29,000, and inventory of $37,000. Compute the net increase or decrease in cash in 2018.

a. Decrease of $9,000
b. Increase of $15,000
c. Decrease of $15,000
d. Increase of $9,000