Jess Brady sells gifts certificates for $$64$ each. She purchases each gift certificate for $$15$ and spends $$4,900$ for fixed costs.

Do not enter dollar signs or commas in the input boxes.

Round your answers to the nearest whole number.

a$)$ Calculate operating income if Jess sells $340$ gift certificates

Operating Profit: $

b$)$ Calculate the revenues needed to obtain an operating income of $$3,800.$

Required Revenue: