costumized Report format with doubled underlines

[#1]

HI,

maybe someone of you can help me. I need a specific format in my application.

I have some subtotal lines which need to be underlined as (..................)

And I have a total line which I need to double-underline? How can I realise that.

Within the Design Grid I did not find it.

Maybe someone can send me a report where it is already done. Then I could adjust it in mine.

Thanks for you help in advance.