The change in operating income is $7,728.
The net operating income is total revenue less direct and indirect expenses.
The net operating income = total revenue - variable expenses - fixed costs.
Initial operating income:
Operating income = 517,000 - 408,430 - 190,000 = -81,430
New operating income:
Operating income = 553,800 - 437,502 - 190,000 = $-73702
Change in operating income = $-73,702 - -81,430 = $7,728
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