Passing Values from User Form

Hi ,

I have a need of using Userforms, through which i need to get information or data. The gathered data from userform shall be further used for the calculation in the main sub or other sub ..

so request you for the information ,

I think , the information is need in two fronts,
1. passing variables from one sub to another
2. passing data (i.e., from ComboBox to Main Sub) from userform

I have simplified the sheet for understanding, I shall attach herewith,

Thanks in adv for the help !!

Regards,
Sri