Question 19 2 pts (Chapter 7: Process Interruptions) Wisconsin Electronics Inc, manufacture electronic modules for car manufacturers. It involves three basic operations etching the circuit boards, soldering components onto each board and testing the module. The table below lists the required processing times and setup times. There is unlimited space for buffer inventory between these steps Process Step Etching Soldering Testing Setup time (min) 42 26 None Processing time (min) 0.15 0.27 What is the average inventory at etching if the batch size is 100 modules? 0.24 74 units O 60 units 0 36.8 units O 50 units