Use a public traded business or company, It can be for a month, quarter, or annual. Make a table for an expense report with all the costs of the business, and then categorize them as fixed or variable. You may have to justify some of your decisions on whether a cost is fixed or variable. Aggregate your fixed and variable costs and look at them in terms of percentages of total cost. In addition to this table, give an summary an report on the costs of the business and how it relates to the industry. A discussion on the percentage of the business that is fixed versus variable cost compared to the industry etc. The report should also include a work cited page that properly cites all the sources you used for the industry comparison.