Darnell enjoys music and sound production. In his basement, he has a recording studio that he uses to create his own music.

Lately, he has been recording and producing local artists’ music. Darnell did not initially charge his first few clients for his audio production, but he has now received $4,350 for his latest works. He plans to continue charging bands and hopes to make a profit. Should this activity be classified as business, investment, or personal?