Firm A$$s demand for a product is $100,000$ units per year. It has a holding cost of $$10$ per unit per year and an ordering cost of $$50$ per order. If the firm is required to order an integer multiple of $500$ units, what order quantity should it use to minimize ordering and holding costs?

Multiple Choice

$1,500$

$500$

$2,000$

$1,000$