Every so often you need a basic black suit, such as this AK Anne Klein black suit via Dillards. I like this suit because it's affordable and perfect for very business formal occasions.
The jacket has a notch collar and a classic single-button front. It pairs with pants or a pencil skirt. The pants are wide-leg with a front hook-tab closure, and the skirt hits perfectly at the knees. The suit is made from a blend of polyester, rayon, and spandex. The jacket is $99; find it here. The pants are $59; find them here. The skirt is $49; find it here.