Flow Cruiseline offers nightly dinner cruises departing from several cities on the eastern coast of the United States including Charleston, Baltimore, and Alexandria. Dinner cruise tickets sell for $80 per passenger. Flow Cruiseline's variable cost of providing the dinner is $40 per passenger, and the fixed cost of operating the vessels (depreciation, salaries, docking fees, and other expenses) is $360,000 per month. The company's relevant range extends to 18,000 monthly passengers. Compute the number of dinner cruise tickets Flow Cruiseline must sell to breakeven and the sales dollars needed to breakeven. Compute the number of dinner cruise tickets Flow Cruiseline must sell to breakeven. Use the shortcut unit contribution margin approach. The number of dinner cruise tickets that Flow Cuiseline must sell in order to breakeven is