Aril Industries is a multiproduct company that currently manufactures $30,000$ units of Part $730$ each month for use in production. The facilities now being used to produce Part $730$ have fixed monthly overhead costs of $$150,000$ and a theoretical capacity to produce $60,000$ units per month. If Aril were to buy Part $730$ from an outside supplier, the facilities would be idle, and $40\%$ of fixed costs would continue to be incurred. There are no alternative uses for the facilities. The variable production costs of Part $730$ are $$11$ per unit. Fixed overhead is allocated based on planned production levels.

If Aril Industries continues to use $30,000$ units of Part $730$ each month, it would realize a net benefit by purchasing Part $730$ from an outside supplier only if the supplier$$s unit price is less than: