Listed below are costs of services provided by an airline company. Consider the cost object to be a flight. Flight attendants and pilots are paid based on hours of flight time.

Classify each cost as direct, indirect, selling, or general and administrative.

$\backslash$table$[[$Cost$,$Classification$],[1.$ Travel agent salaries,$],[2.$ Co$-$pilot wages for plane flight,Solling$],[3.$ Advertising,Direct$],[4.$ Beverages served on plane,$],[5.$ Accounting manager salary,$],[6.$ Depreciation $($straight$-$line$)$ on plane,$],[7.$ Fuel used for plane flight,$],[8.$ Flight attendant wages for flight,$]]$