Answer:
B) Increase by $77,000
Step-by-step explanation:
variable costs per unit:
manufacturing $250
mktg. and adm. $50
total $300
contribution margin per unit = sales price - total variable costs = $330 - $300 = $30
if the special is accepted, operating income will increase by = ($30 contribution margin per seat x 3,000 seats) - $13,000 increase in fixed costs = $90,000 - $13,000 = $77,000