You are asked to make a sales and operation plan for the next year. The demand forecasts for the next four quarters are 3,100, 2,400, 4,200, and 3,550 units, respectively. The production rate is 75 units per quarter per employee. The beginning inventory of the first quarter is 100 units. The ending inventory target of quarter 4 is 50 units, which must be met. Using a chase strategy, how many employees are needed in quarter 1?