please solve

The ELC Corporation manufactures two induso'ial-sized electrical devices: generators and alternators. Both of these products require wiring and testing during the assembly process. Each generator requires 5 hours of wiring and 2 hour of testing and can be sold for a $420 prot. Each alternator requires 2 hours of wiring and 1 hours of testing and can be sold for a $260 prot. There are 400 hours of wir'ng time and 300 hours of testing time available in the next production period and ELC wants to maximize prot What is the optimal number of altemators