Nantor Corporation has two divisions. Southern and Northern. The following information was taken from last year's income statement segmented by vision Sales Contribution margin Divisional segment margin Northern Total Company $ 8,000,000 Southern $ 5,000,000 $ 3,300,000 $ 2,000,000 $ 2,100,000 $1,400,000 $ 3,000,000 $ 1,200,000 $ 600,000 Net operating income last year for Nanfor Corporation was $800,000. If the Northern Division's sales last year were $600,000 higher, how would this have changed Nantor's net operating incdime? (Assume no change in selling prices, variable expenses per unit, or fixed expenses) Multiple Choic $1,200,000 increase $240,000 increase $60,000 increase