Exercise 5C: Utility of a restricted resource (Value: 10 points) The School Pack company manufactures packages for the school with a very resistant plastic bottom. It has three models that are the best sellers. The following table gives you information about these models. Mod A Mod B Mod C Sale Price per Unit $ 110 $ 150 $87.50 Variable cost per unit $ 30 $ 60 $ 27.50 Processing time in the plastic machine for each unit 3 mins 4 mins 1 min Amount of plastic per unit (in pounds) 4 lbs 5 lbs 3 lbs The restricted resource is the processing time on the machine. 1. Determine the highest and lowest performance model in the use of processing time as a restricted resource. 2. Determine the highest and lowest performance model in the use of plastic if this is the restricted resource. 3. Determine the model that has the highest contribution margin. Was this model the one with the highest performance in the previous answers? If it was not, explain why