Condensed monthly operating income data for Korbin Inc. for May follows:

                         Urban Store           Suburban Store         Total

Sales                       $80,000                $120,000        $200,000

Variable costs               32,000                    84,000        116,000

Contribution margin        $48,000                  $ 36,000       $84,000

Direct fixed costs            20,000                    40,000        60,000

Store segment margin      $28,000                  $ (4,000)       $24,000

Common fixed cost           4,000                      6,000         10,000

Operating income           $24,000                  $(10,000)       $14,000

Additional information regarding Korbin's operations follows:

●One-fourth of each store's direct fixed costs would continue if either store were closed.

●Korbin allocates common fixed costs to each store on the basis of sales dollars.

●Management estimates that closing the Suburban Store would result in a 10% decrease in the Urban

Store's sales, while closing the Urban Store would not affect the Suburban Store's sales.

●The operating results for May are representative of all months.

A decision by Korbin to close the Suburban Store would result in a monthly increase (decrease) in Korbin's operating income of

A. $(1,200)

B. $4,000

C. $(6,000)

D. $(10,800)