Dunk, Inc. is a calendar year Subchapter S corporation since 2018, has two shareholders each of whom own 50 shares of stock; each shareholder purchased their stock for $6,000. Ref, one of the shareholders, loaned Dunk, Inc. $2,000 on June 1, 2018, and $6,000 on May 1, 2019. Dunk, Inc. had $9,000 ordinary income on December 31, 2018. Both shareholders reported their share of the Dunk, Inc's income on their individual returns for 2018. For 2019, Dunk, Inc. reported an ordinary loss of $8,000. No distributions were made in 2018 or 2019 by Dunk, Inc. What is the adjusted basis of Ref's stock on December 31, 2019?