A sandwich shop has three types of customers (sandwich-only, soup-only, and combo). The shop has three workstations, each staffed by a single worker (sandwich, soup, and checkout). 6 sandwich-only customers arrive each hour and spend 7 minutes at the sandwich workstation and 3 minutes at the checkout but do not visit the soup station. 8 soup-only customers arrive each hour spend 7 minutes at the soup station and 2 minutes at the checkout but do not visit the sandwich station. 2 combo customers arrive each hour and spend 5 minutes at the sandwich station, 6 minutes at the soup station and 3 minutes at the checkout. Instruction: Round your answer to the nearest 0.1 customer. What is the flow rate of sandwich-only type customers? customers per hour