Playing golf with clients is one way to 'mix business with pleasure'. [=to do something enjoyable that is related to your work]
I accidentally 'mixed up' the two files. [=I put each of the files in the place where the other one should have gone]
He 'got mixed up in' a plan to destroy the government. [=he became involved in a plan to destroy the government]
(..) for pandering while they run Wingo games Exactly right Excuse me I'm paid to mix Ha ha! Good-bye, Paul Take care, Paul It takes courage to say that (..)1987 Broadcast News