A corporation operates in two sales territories, North and South. Data concerning last year's operations per below Sales Variable expenses Contribution margin Traceable fixed expenses Segment margin North $360,000 270,000 90,000 42,000 $ 48,000 South $ 76,000 46,000 30,000 35,000 $ (5,000) The company's common fixed expenses were $20,000 last year. If operations in the South Sales Territory would have been discontinued at the beghning of last year, how would this changed the net operating income of the corporation as a whole? $5,000 increase $5.000 decrease $23,000 increase $43.000 increase