Sam's Skateboard Company produces skateboards that are custom-built to user specifications. No two skateboards are alike. The overall manufacturing sequence for a skateboard is divided into three main phases-part fabrication, assembly, and testing. The company currently operates two production lines in its main factory (shown below). Line one has one part fabrication station, two assembly stations, and one testing station. Line two has one part fabrication station, one assembly station and one testing station. Each station has capacity 1. The processing time (in hours) for a single skateboard at each station is shown in the diagram below.