Rounding profile ( sales master data)

Hi Gurus,

I want to use the rounding profile but I don't know how it s working.

I would like that the system adjust the order proposal quantity in my sales order according to the rounding.

For example : I n my sales order, from a requirements of 2 units, the system is to round up to 5; from a requirement of 32 units, the system is to round up to 40.

How can I do the customising in order to reproduce this case.

Anybody can explain step by step this customising?

Thanks a lot

Regards

Kari