Azuki Corporation operates in two sales territories, Urban and Rural. Data concerning last year's operations appear below: Azuki's common fixed expenses were $25,000 last year. If Urban sales were 10% higher last year, by approximately how much would Azuki's net operating income have increased? (Assume no change in selling prices, unit variable expenses, or total fixed expenses.) $4,400 $32,000 $6,400 $11,200