1. Precision Engineering Inc. (PEI) is a small manufacturer of precision tools used to construct research equipment for engineering departments at colleges and universities. It sells its two main products, PEC-1 and PEC-2, for $200 and $250, respectively. Due to increasing demand and a shortage of specialized labor, PEC has found it increasingly difficult to meet the current weekly demand of 40 units of PEC-1 and 15 units of PEC-2. The following flow diagram shows the manufacturing requirements for the two products and the three types of materials required. Material A is used in PEC-1 only, Material C is used in PEC-2 only, and Material B is used in both PEC-1 and PEC-2. y

The amount of weekly labor available for the four manufacturing operations follows:

P1: Receiving and testing materials2,000minutes

P2: Machining3,500minutes

P3: Assembly2,000minutes

P4: Finishing3,500minutes

Required: What is the best production plan for PEC? Why?