Castner Corporation is considering implementation of a JIT inventory system. The company's industrial engineer recently conducted a study to determine the average number of days spent in each activity of the production process. The following table summarizes her findings. Production Activity Inspecting materials Storing materials Moving materials into productiorn Setting up production equipment Cutting materials Bending materials Assembling finished products Painting finished products Number of Days 15 4 Required c. Calculate Castner's total cycle time. d. Determine Castner's manufacturing efficiency ratio. c. Total cycle time d. Manufacturing efficiency ratio days