For an easy, classic work look, I like this ensemble from The Limited. A simple mix of black and white, the printed skirt gives the look a lighter quality.
Normally, I would choose a collarless blouse to go with the knit, sweater jacket. However, most of the shirts available at Limited right now are off-white, and the skirt is true-white, so matching was more important. If you want to skip the collar, try this flutter-sleeve blouse from Forever21.