Computer’s R Us, is a manufacturer of computer keyboards. The requirements over a typical six-month period are as follows; Demand per month. 1: 600 2: 600 3: 450 4: 750 5: 900 6: 300 The current workforce level is 4 workers. Production rate is 150/worker/month. The following costs apply:Wages = $2,000/worker/month Hiring cost = $200/worker Layoff Cost = $250/worker Inventory holding cost = $1/unit/month Back ordering cost = $2/unit/month What would be the production rate per month for a level strategy?