Staley CoManufactures Computer Monitors

Staley Co.manufactures computer monitors.The following is a summary of its basic cost and revenue data:
Assume that Staley Co.is currently selling 600 computer monitors per month and monthly fixed costs are $80,000.If an $18,000 increase in the advertising budget would increase monthly sales by $60,000,the new operating income would be:

A) $19,800.
B) $21,800.
C) $24,800.
D) $23,800.
E) $20,800.