Cindy's Toys has an average inventory of $1,800$ teething rings. The carrying cost per unit per year is $5\text{'}.$ Cindy places an order for $3,600$ teething rings on the first of each month and the order cost is $$25.$ What is the average inventory using the EOQ? $2,251$ units $2,596$ units $2,746$ units $3,286$ units$3,300$ units