Transfer Data From Excel to SAP

Hi Team,

While working on T-code VA02 i want to transfer the values provided in Excel to SAP.

think i got values in a1, b1 and so on..by name Billing plan,Value

I want to go to   the line item  and then the billing tab and under that tab the values should be entered based on the Excel Column names.

and in SAP  to go to next line item i am using Shift+ F7 to go up..it should go automatically till the value is blank..Please do let me know how ?

Also after updation i want to add/delete a specific column only.. Is it possible..