A project manager has four crews which can be hired on a temporary basis during peak construction periods. The manager currently has three projects more than can be handled with his regular crews. It is desired to determine the crew assignments that will minimize the total project cost. The costs of using certain crews for certain projects are presented as follows:
Crew 1 Project A: $4000 Project B: $3000 Project C: $9000 Crew 2 Project A: $7000 Project B: $1000 Project C: $8000 Crew 3 Project A: $2000 Project B: $6000 Project C: $4000 Crew 4 Project A: $9000 Project B: $5000 Project C: $5000