A store has an ordering cost of $$250$ per order, a carrying cost of $$4$ per unit, annual product demand of $6000$ units, and it purchases product from a supplier for $$500$ per unit. The supplier has offered the store a discount price of $$400$ if it will purchase $1,200$ units or more. The optimal order quantity for the store is: A$.866$ units exactly B$.1200$ units exactly C$.$ at least $866$ units D$.$ at least $1200$ units A store has an ordering cost of $$250$ per order, a carrying cost of $$4$ per unit, annual product demand of $6000$ units, and it purchases product from a supplier for $$500$ per unit. The supplier has offered the store a discount price of $$400$ if it will purchase $1,200$ units or more. The minimum total inventory cost for the store is: A$.$ $$3,607,200$ B$.$ $$3,464,000$ C$.$ $$1,877,000$ D$.$ $$2,407,300$