The following data is used in a cut and try aggregate planning under the 'Exact production: Vary workforce model: Demand Forecast Number of working days Inventory holding cost = $10/unit Hiring and training cost = $120/worker Cost of layoff workers = $165/worker Safety stock = 10% of monthly demand marginal cost of backordering = $2/unit/month JANUARY FEBRUARY MARCH 1800 1100 22 21 1500 19 marginal cost of subcontracting = $30/unit Labor hours required = $5/Unit Straight-time cost (first eight hours each day) = $5/hour overtime cost = $7.50 Normal shift = 8hrs/day Beginning inventory = 500 units The cost of layoff of workers for January is (put number only)