7. Sugiki Corporation has two divisions: the Alpha Division and the Delta Division. The Alpha Division has sales of $820,000, variable expenses of $369,000, and traceable fixed expenses of $347,300. The Delta Division has sales of $460,000, variable expenses of S294,400, and traceable fixed expenses of S134,100. The total amount of common fixed expenses not traceable to the individual divisions is $97,300. What is the company's net operating income? a. $135,200 b. $37,900 c. $616,600 d. $519,300