Project approach?



Hi All,

I have data set related to retail domain.
My problem is that I have Variable Manufacture in that I have 24 level so my target client also in manufacture only so I need to find out which manufacturers influencing my sales how?
Please any one tell me the approach for this.
Variable Names: Retailer, Sub.Category, Manufacturer, Brand, Period, Units_Sum_Year-ago, Units_Sum_Curr-Year.