Three-step lawnmower manufacturing process uses a machine at each step and has an average flow time of 15.5 hours. The times needed to setup the machines at Step 1, Step 2, and Step 3 are 30 minutes, and 1 hour, respectively. Each lawnmower spends 1hour being processed by the Step 1 machine, 1.5 hours being processed by Step 2 machine, and 3 hours being processed by the Step 3 machine. Each lawnmower spends an average of 8 hours waiting between the three steps. What is the total value-added time of this process?