The figure below details the process flow for two types of customers who enter Barbara's Boutique shop for customized dress alterations. After step T1, Type A customers proceed to step T2 and then to any of the three workstations at T3, followed by steps T4 and T7. After step T1. Type B customers proceed to Step T5 and then steps T6 and T7. The numbers in parentheses are the minutes it takes to process b. If 30 percent of the customers are Type A customers and 70 percent are Type B customers, what is the average capacity of Barbara's shop in customers per hour? customers. (Enter your response rounded to two docimal places.)