Programming Problem In Vb 6.0 Please help me to come out of this problem.

Dear friends I have a programming problem in VB 6.0 . Please help me.I have made a software in VB and in the back end I have used SQL Server database. The reports of the project is made using Data report facility of VB a simple look of the same is given below.?

Now what I want to know is in the above report the commodities are distributed in three discount groups and they are First, Second, and third. Previously I made report looking like this-??

Now you people out there can see the difference on your own in the second example it is classified into the discount groups and displayed as such by subtotaling the groups. But the second example is made by displaying every data on a form which has the limitation of 20 entries due to which I have to shift to use Data Reporting and which is shown in the first example but the main problem arises here and that is I don’t know how to distinguish the entries into the discount groups and show in the report. Please help me friends. Thank you very much in advance for your kind help.?

I have a problem on how to filter selected list from a drop down combo box. For instance, I have a list of sole proprietorship,partnership and corporation, after I selected the option partnership, all of the records under that field will  be automatically displayed on the data grid control or file list box. Can you help me out on this? sample codes will do. Thank you so much in advance.

sorry.. One more... Also what data control I'm going to use in monitoring expired business papers? like for instance, once a business papers expired, it will be automatically transferred from the data grid to a list box... Do I have to use the timer data control? sample codes would help me out on this... Thanks a lot again...