[He's putting his earplugs in as well without turning to Karkat yet, continuing to talk with Sollux.]

Centers, Marts, wherever people can be hired. You can do pretty much whatever you want, job wise, or make your own sort of business. [After answering, he turns to Karkat now that his own earplugs are in.. and cracks something of an awful smile.]

Sanaa, sing. [Oh, hey, how did that Altaria get behind you, Karkat? Probably while you were raging..]