The document discusses the Personnel Productivity Ratio (PPR), which is the relationship between total payroll costs and gross profit. It provides two examples of how to calculate the PPR for different companies - one with a PPR of 35% and one with 65%. It indicates that a PPR below 55% may mean the payroll is too low and could be increased to boost sales, while a PPR above 55% likely means the payroll costs are too high and changes need to be made to reduce costs and increase profits. The optimal PPR can vary by industry but around 55% generally indicates the high end of the ideal range.