$28.$ A firm practices the pure chase strategy of aggregate planning. It produced $1000$ units. Demand in the next period is estimated at $800,$ and demand over the$---$ periods $($its aggregate planning horizon$)$ is estimated to average $900$ units, in the following chase strategy, the firm will

$$ Layoff workers to match the $200$ unit difference

$$ Implement a lower price point to increase demand

$$ Add $100$ units to inventory in the next period

$$ Hire workers to match the $100$ unit difference

$$ Add $200$ units to inventory in the next period