Hope You are dealing with Table in Smart form for displaying your contents in the print.
just before the table placed in the smart form, Create a Flow Logic.
For creating a Flow Logic take the smart form in Edit mode place the cursor just above the table -> Right click -> Create -> Flow Logic -> Program Lines
In that program lines provide your internal table and work area as the Import parameter.
after that loop your table
Loop itab into wa_tab.
if wa_tab-Previous Bill is initial and wa_tab-Current Bill is initial and wa_tab-Cumulative Bill is initial.
Clear :wa_tab-slno, wa_tab-servno, wa_tab-serv.desc.
modify itab from wa_tab.
endif.
endloop.
Delete itab where servno is initial.
This will check whether the bills are initial or not if all are initial it will clear the initial fields such as serial number, service number, service description etc and updates the table.
then delete the itab which is having service no blank(hope that for every valid line there will be a service number or replace sevr no with a similar field). This will avoid blank line in the table.
The output will contain only valid entries having values in your bill only.
Try and Revert.