Data concerning Tietz Corporation's single product appear below Fixed expenses are $1,038,000 per month. The company is currently selling 9,700 units per month.The marketing manager would like to introduce sales commissions as an incentive for the sales staff. Themarketing manager has proposed a commission of $12 per unit In exchange, the sales staff would acceptan overall decrease in their salaries of $108,000 per month. The marketing manager predicts thatintroducing this sales incentive would increase monthly sales by 370 units.Required:What should be the overall effect on the company's monthly net operating income of this change?(Negative amount should be indicated by a minus sign. Omit the $ sign in your response.)Change in net operating income $