The problem will be solved as a performance research problem: in the factory there are three types of workers:

1. Weak

2. Medium

3. Strong

A strong worker produces 60 units per hour and costs NIS 55 per hour.

An average worker produces 50 units and costs NIS 40 per hour.

A weak worker produces 30 units and costs NIS 32 per hour.

Constraints:

The factory manager demands to produce 10000 units per day.

A working day lasts only about eight hours.

An employee must work at least 4 hours.

How many workers should I employ and of what type in order to reach the product quota in the number of working hours required and of course at minimum cost?