In a group of 500 people determine how many are suspects in the following scenario.

A wallet was stolen from an office in a building with 500 employees. The suspect was wearing black pants, a white button-down shirt, and a multicolored tie. In one of the offices in the building, the following data was collected.

30 people total in the office

22 wearing a white button down shirts

16 wearing black pants

7 wearing a multicolored tie

Using the data, how many suspects are there?