Bluemel Air uses two measures of activity, flights and passengers.

The cost formula for plane operating costs is $$43,670$ per month plus $$2,879$ per flight plus $$10$ per passenger.

The company expected its activity in December to be $85$ flights and $281$ passengers, but the actual activity was $90$ flights and $278$ passengers. The actual cost for plane operating costs in December was $$314,740.$

The plane operating costs in the flexible budget for December would be closest to:

$$314,740$

$,$$$291,195$

$-$$$308,324$

$=>,$$$305,56$