Class).r Cruiseline offers nightlyr dinner cruises departing from several cities on the East lCoast ofthe United States including Charleston, Baltimore. and Alexandria. Dinner cruise tickets sell for $60 per passenger. Classy Cruiseline's variable cost of providing the dinner is $30 per passenger. and the fixed cost of operating the vessels (depreciation. salaries. docking fees, and other expenses) is $30,000 per month. The company's relevant range extends to 17.000 monthly.r passengers. If Classy Cruiseline sells an additional 600 tickets. by what amount will its operating income increase {or operating loss decrease)? First, identify the formula. then compute the operating income increase {or operating loss decrease). x E = Operating|:| lxl |=| |