I’m a trained composer and extremely well versed in most software. I’ve had years of tutoring in theory and composing. I do this on the side, I don’t need a high wage-I could honestly do this for free.
I’ve composed dozens of full length scores, and written for up and coming pianists (Rao, Huang) as well as played with composing for short films and other media that requires scores.
If I were to get this job, I would write a thematic piece that sets the mood of the commercial, and really represents the advertisement. Although it is only background music, I would write a musically rich and interesting piece.