Raner, Harris and Chan is a consulting firm that specializes in information systems for medical and dental clinics. The firm has two offices$$one in Chicago and one in Minneapolis. The firm classifies the direct costs of consulting jobs as variable costs. A contribution format segmented income statement for the company$$s most recent year is given:

Total Company Office

Chicago Minneapolis

Sales $ $540,000100\mathrm{.}00\%$ $ $180,000100\mathrm{.}00\%$ $ $360,000100\mathrm{.}00\%$

Variable expenses $270,00050\mathrm{.}00\%54,00030\mathrm{.}00\%216,00060\mathrm{.}00\%$

Contribution margin $270,00050\mathrm{.}00\%126,00070\mathrm{.}00\%144,00040\mathrm{.}00\%$

Traceable fixed expenses $151,20028\mathrm{.}00\%93,60052\mathrm{.}00\%57,60016\mathrm{.}00\%$

Office segment margin $118,80022\mathrm{.}00\%$ $ $32,40018\mathrm{.}00\%$ $ $86,40024\mathrm{.}00\%$

Common fixed expenses not traceable to offices $75,60014\mathrm{.}00\%$

Net operating income $ $43,2008\mathrm{.}00\%$

$2.$ By how much would the company$$s net operating income increase if Minneapolis increased its sales by $$90,000$ per year? Assume no change in cost behavior patterns.