Yost-Perry (YPI) manuafactures a mix of affordable guitars (ABC) that are fabricated and assembled at four different processing stations (QXYZ). The
operation is a batch process with small setup times that can be considered negligible. The product information (priceweekly demand and processing times) and
process sequences are shown in Figure 7.12. Raw materials and purchase parts (shown as per unit consumption rate) are represented by inverted triangles. YPI is
able to make sell up to the limit of its demand per week with no penalties incurred for not meeting the full demand. Each workstation is staffed by one highly
skilled worker who is dedicated to work on that workstation alone and is paid$15 per hour. The plant operates one 8-hour shift per day and operates on a5 day
work week (ie. 40 hours of production per person per week). Overhead cost are $9000/week. Which of the four workstations WXTZ has the higest aggregate
workload and thus serves as the bottleneck for YPI?