Apparatus, and an associated method for facilitating the performance of three-call operations, such as a call-waiting feature, at a mobile station. The bias contact roll member is supplied with an electrical bias including an oscillating voltage signal having, in one mode of operation, a clipped AC input voltage and in a second mode, an unclipped AC input voltage. A carton for the potato pieces is formed from a single-piece blank provided with a pair of microwave susceptor surfaces and reinforced corners.