A firm practices a chase strategy. Production last quarter was 800 . Demand over the next four quarters is estimated to be 1000,1000,800, and 700 . Hiring cost is $25 per unit, and layoff cost is $15 per unit. Over the next year, what will be the sum of hiring and layoff costs? A) $2,500 B) $7,000 C) $7,500 D) $12,500 E) $9,500