help! i think im filling out this practice question wrong! thanks in advance!

Deita Air Lines owns hundreds of aircraft, with about 60 percent of its fleet consisting of Boeing aircraft, while Airbus aircraft make up about 40 percent. It sold seven used Boeing 767.300 jets to Amazon, com as Amazon plans to expand its growing Amazon Alr cargo service. The average age of the jets is about 20 years old. Assume the records of the company reflected the following for the jets that were sold: Required: 1. Prepare the journal entry for the disposal of the airplanes, assuming that the airplanes sold for: Note: If no entry is required for a transaction/event, select "No journal entry required" in the first account field. a. $15,600,000 cash b. $17,100,000 cash c. $15,000,000 cash