How can we create sales person hierarchy in oracle.

Dear All,

I am having below business scenario for which i need to create sales person hierarchy.

Would like to know in which Oracle module how can we create sales person hierarchy.

Business Case:

There are different levels of sales person in the organization. Each sales person reports to his immediate superior as part of sales hierarchy.

Example: Sales hierarchy is as below:

Sales person

ASM

DSM

NSM

etc. 

Actual sales is done by the ground level sales person. 10 sales person reports to ASM. 3 ASM's reports to DSM. 2 DSM's report to ASM.

Depending upon the sales of the ground level person, the sales of the person higher in the hierarchy will be calculated.