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A manufacturing process is illustrated below:

Cycle times for the four steps shown are given below. Note that step 3 has two workers (a) and (b), and given their different levels of experience, their cycle times can be different (the exact cycle times are given below).

Step 1: 12 mins

Step 2: 11 mins

Step 3-a: 39 mins

Step 3-b: 37 mins

Step 4: 10 mins

What is the capacity of the entire system in units produced per hour? Enter your answer rounded to 2 decimal places.

Step 3-a Step 1 Step 2 Step 4 Step 3-b