Need help in custom report

Is it something like that?

[Sale Groups:2, 1, 1]
@{REPORT ORDER DETAILS:MT.Group,O.Quantity.Sum::{0}:,}
>>$1
{REPORT ORDER DETAILS:M.GroupCode,O.Quantity.Sum,O.ExactTotal.Sum:(MT.Group=$1)}
>Total:||{REPORT ORDER DETAILS:O.ExactTotal.Sum:(MT.Group=$1)}