LO Calc, How to delete certain rows in spreadsheet automatically

Hi all,

I am doing some taxes for some elderly people & I gave them a spreadsheet to use for charitable giving but now I need to edit it down and have a minor problem.

I need some kind/type of command that will automatically delete certain rows that do not have any items in them.
I know I could do this by hand but it certainly is labor intensive & I worry that I might delete a row through error that they need.
Is there a way to automate this process?

Columns A, B, & C are fixed items/values, Rows 7 & 8 of cols B thru H repeat later on down with different thing in A7.
They only had to fill in columns D, E, & G and the rest (F & H) would be computed.
There are some rows at the end of each 'set' where A is blank and B & C have zeroes in them.

This one 'set' is just one of many that I have to clean up for just this couple, there are many more to do!

Thanks a bunch, I very much appreciate any & all help I can get!
Sincerely,
Cindy ;>)

If there is a way to include an image to make things more clear, please let me know how to do so.