14) Ruben intends to sell his customers a special round-trip airline ticket package. He is able to purchase the package from the airline carrier for $170 each. The round-trip tickets will be sold for $200 each and the airline intends to reimburse Ruben for any unsold ticket packages. Fixed costs include $5,140 in advertising costs. For every $27,000 of ticket packages sold, operating income will increase by .