Selling price Variable expenses Contribution margin Per unit $135 B1 54 Percent of Sales 1 00% 60 sex s Fixed expenses are $87,000 per month and the company is selling 2,900 units per month 2-a. Refer to the original data. How much will net operating income increase (decrease) per month if the company uses higher-quality components that increase the variable expense by $5 per unit and increase unit sales by 20%. -b. Should the higher-quality components be used? 2 Complete this question by entering your answers in the tabs below. Reg 2A Reg Refer to the original data. How much will not operating income increase (decrease) per month if the company uses higher quality components that increase the variable expense by 55 per unit and increase unit sales by 20% Net operating com p reses Reg 2 >