Ace Parts and Supply makes a variety of car parts. The company produces $6,500$ A$90$ parts each year. Each A$90$ sells for $$11$ and has a contribution margin of $$1.$ Currently, $$16,400$ of fixed manufacturing overhead is allocated to the A$90$ product line. If Ace Parts and Supply discontinues the A$90$ product line, $$7,100$ of fixed manufacturing overhead costs would be avoided. What would be the impact on total operating income if the A$90$ product line were to be discontinued?

A$.$ Increase in total operating income of $$600$

B$.$ Increase in total operating income of $$2,800$

C$.$ Decrease in total operating income of $$2,800$

D$.$ Decrease in total operating income of $$600$