Average demand for a particular item is $1,200$ units per year. It costs $$100$ to place an order for this item, and it costs $$24$ to hold one unit of this item in inventory for one year. If the fixed$-$order$-$interval model is chosen in this instance, how often $($on average$)$ will this item be ordered?

Multiple Choice

twice every three months

three times every two months

once every other month

once a month

twice a month