Develop a production plan and calculate the annual cost for a firm whose demand forecast is: fall, 9,800; winter, 7,900; spring, 6,900; summer, 11,800. Inventory at the beginning of fall is 490 units. At the beginning of fall, you have 30 workers, but you plan to hire temporary workers at the beginning of summer and lay them off at the end of summer. In addition, you have negotiated with the union an option to use the regular workforce on overtime during winter or spring if overtime is necessary to prevent stock-outs at the end of those quarters. Overtime is not available during the fall. Relevant costs are hiring, $100 for each temp; layoff, $200 for each worker laid off; inventory holding, $5 per unit-quarter; backorder, $10 per unit; regular time, $5 per hour; overtime, $8 per hour. Assume that the productivity is 0.5 unit per worker hour (ie., two labor hours required for each unit), with eight hours per day and 60 days per season. In each quarter, produce to the full output of your regular workforce, even if that results in excess production. In winter and spring, use overtime only if needed to meet the production required in that quarter. Do not use overtime to build excess inventory in prior seasons expressly for the purpose of reducing the number of temp workers in summer. (Leave the cells blank, whenever zero (0) is required. Negative values should be indicated by a minus sign. Round up "Temp workers", "Workers hired", and "Workers laid off" to the next whole number and all other answers to the nearest whole number.)