Excel Cruiseline offers nightly dinner cruises departing from several cities on the East Coast of the United States including Charleston, Baltimore, and Alexandir Dinner cruise tickets sell for $80 per passenger. Excel 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 exiends to 18,000 monthly passenger Compute the number of dinner cruise tickets Excel Cruiseline must sell to break even and the sales dollars needed to break even. Compute the number of dinner cruise tickets Excel Cruiseline must sell to break even. Use the shortcut unit contributton margin approach. First, identify the formula, then compute the breakeven sales in units. (Complete all input fields. For amounts with a $0 balance, make sure to enter " 0 " in the appropriate input field.) Breakeven units Compute the sales dollars needed to break even. Use the shortcut unit contribution margin ratio approach. First, identify the formula, then compute the breakeven sales in dollars. (Complete all input fields. For amounts with a $0 balance, make sure to enter "0" in the appropriate input field. Enter the contribution margin ratio as a whole percent.) \begin{tabular}{|c|c|c|c|} \hline 1+ & & = & Breakeven sales \\ \hline 1+ & % & = & \\ \hline \end{tabular}