Research and define the common ratios (listed directly below) which may be used to analyze financial statements when attempting to detect fraudulent activity. Discuss how each of these 4 ratios can be used to detect fraud. Be sure to use and cite one resource for the initial threaded discussion. The resource may include the textbook used in this class. 

1st Ratio: Current Ratio

2nd Ratio: Bad Debt Percentage Ratio

3rd Ratio: Sales Return Percentage

4th Ratio: Cost of Goods Sold Percentage