Here is what you know about your company: its fixed monthly expenses are $28,000 and its contribution margin ratio is 62%. You also know that your company's fixed monthly expenses do not change. What you do not know but what you want to find out is what is the best estimate of the company's net operating income in a month when sales are $88,000? Multiple Choice $5,440 O $54,560 $26.560 O O O $60,000