pleass answer if you sure other wise skip it

Consider that Kiwi, an apparel producer, practices a chase strategy. Production last quarter was 1000. Demand over the next six quarters is estimated to be 1000, 800, 900, 1100,1200,900. Hiring cost is $20 per unit, and layoff cost is $5 per unit. Over the next one and a half years, what will be the sum of hiring and layoff costs