Maybe I’ve just a black out. But I wanted to notate a V7sus (inversion 1) writing a dominant 7 without the suspension of the 4th in RNA. No idea ...
g,c,d,f => c,d,f,g
The suspension won't be shown in the Roman numerals, but it can be shown in the figured bass:
As long as we remember that figured bass shows the intervals above the bottom pitch, it just becomes a simple counting exercise.
Combined with Roman numerals, we would label beats 3 and 4 of the first measure as a V chord, and we just have to understand that the C on beat 3 is a suspension:
For a related question, see Figured bass 52?