Cost centres are used to register the time each employee spends on a certain project/job. This way, it is possible to know exactly how long each employee has worked on a particular project/job. You are able to use cost centres with iT-30(0), VT, mobile, GS-GT. Each IN booking will then be connected to a cost centre (depending on the settings in Settings - System - Application config.: Use cost centers on YES and Show all cost centers in VT on YES.).