Dave, my concern with your recommendation is that 9,800,000 is the maximum (audio + video) COMBINED (audio + video) allowable bitrate for a DVD. Your suggestion leaves no room for the audio file.
My rule of thumb is to go no larger than a CBR of 8,000,000 for less than a 70 min. DVD.
Anything larger and I use a bitrate calculator to determine optimum settings.
Some folks say that you can go as high as 8,500,000 but I stick to my rule.
I’ve burned thousands of DVDs over the years and have have never had any returned to me.