Consider a manufacturing process depicted by the following flowchart. A1 C1 A2 B C2 A3 Station A has 3 parallel operators, A1, A2, and A3. Station C has 2 parallel operators, C1 and C2. Each unit only needs to be processed by one of the operators A1, A2 and A3. After being processed at Station B, a unit then needs to be processed by either C1 or C2. The process time of the individual operators are given as follows. Each of A1, A2, and A3: 18 minutes B: 4 minutes Either of C1 and C2: 1 minutes. What is the capacity (in units/hour) of the whole process? Round your final answer to 2 decimal places if it is not a whole number.