Yost-Perry Industries (YPI) manufactures a mix of affordable guitars (A, B, C) that are fabricated and assembled at four different processing stations (W. X,Y,Z ). The operation is a batch process with small setup times that can be considered negligible. The product information ( price, weekly demand, and processing times) and process sequences are shown below. Purchased parts and raw materials (shown as a per-unit consumption rate) are represented by inverted triangles. YPI is able to make and sell up to the limit of its demand per week with no penaities 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 a 5-day work week (i.e., 40 hours of production per person per week). Overhead costs are $9,000/ week. Which of the four workstations, W, X, Y, or Z has the highest aggregate workload, and thus serves as the bottleneck for YPI? with a total load time of minutes. (Enter your response as an integer.)