To chart data, you need a series of values for the chart. This series can be all in one field or be drawn from the found set. How you do it depends both on the type of chart you want and how your data is structured.
I only see data for one month in your example. Do you want a bar chart where each sales person has a different bar and you show the margin for a specified month, one sales person with monthly margin values for each month or...?