A technique for incorporating a liquid additive into a nonwoven web is disclosed. The method comprising: measuring signal strengths of signals from a plurality of the transmitters of the position broadcast system; and determining that the mobile device is out of range of the position broadcast system if the measured signals strengths satisfy at least one out of range criterion. PCM memory output is determined using differentiated timings of read outputs changing state, rather than differentiated values of read outputs. A baseline price for the services is divided by the total number of points to provide a per-point price.