How to best format nested repeat regions

I have a nested repeat query on a page which I got to work based on your tutorials. The master table has about 7 columns and the detail table has about 3 columns. I’m now trying to figure out the best way to format the data so it looks nice. Is it possible to have the detail table inside a master table column? I tried to do it with the table generator, and then inserting the second repeat in one of the columns but didn’t seem to work so I thought I’d ask the experts.

Thanks,
Rick