Trouble Maker was a mixed unit formed by Cube Entertainment in 2011 with members Jang Hyunseung, and HyunA, the group has sold more than 74K physical copies in South Korea.
Here is a summary of their sales in the country.
Korean Discography: 74,374 copies sold
Trouble Maker
Format: 1st Mini Album
Release Date: December 1st, 2011
1st Month Sales (Gaon): 29,383 copies sold (#3)
Total Sales in South Korea (Gaon): 181,920 copies sold
29,383 copies sold in 2011
9,522 copies sold in 2012
3,428 copies sold in 2013
1,289 copies sold in 2014
484 copies sold in 2015
108 copies sold in 2016
Chemistry
Format: 2nd Mini Album
Release Date: October 28th, 2013
1st Month Sales (Gaon): 30,934 copies sold (#4)
Total Sales in South Korea (Gaon): 54,994 copies sold
29,970 copies sold in 2013
134 copies sold in 2014
189 copies sold in 2015
128 copies sold in 2016