A company's cost formula for its supplies cost is $$1,200$ per month plus $$20$ per unit. For the month of November, the company planned for activity of $618$ units, but the actual level of activity was $610$ units. The actual supplies cost for the month was $$13,850.$ The spending variance for supplies cost in November would be closest to:

$$290F$

$$450U$

$$290$ U

$$450F$