Azuki Corporation operates in two sales territories, Urban and Rural. Data concerning last years operations appear below:

	Urban	Rural
Sales	$ 320,000	$ 80,000
Variable expenses	208,000	56,000
Contribution margin	112,000	24,000
Traceable fixed expenses	48,000	30,000
Segment margin	$ 64,000	$ (6,000)

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.)

$11,200

$32,000

$4,400

$6,400