A mobile station is in a wireless local area network \u2018WLAN\u2019 environment and receives beacon frames that lack any WLAN regulatory information. The detection line marks an entry to andor exit from the corresponding sub-area. A purchase token is generated at the purchase server and assigned to the on demand client. The application program produces a user interface that enables the agent to indicate when the agent is going on break and the type of break that the agent is taking. In the slider a fork is provided with two prongs positioned on opposite sides of the plane of the teeth and pivoted at a point of the slider in such a way that it can rotate in a plane perpendicular to the plane of the teeth when a force is exerted on at least one of its prongs by the tab connected to it by its ring. If they are both zero, then a carry propagation out of that bit position into the least significant position of the estimated partial remainder is not possible, and a quotient digit of zero is chosen.