Prefix & Suffix to paragraph style

I have been scratching my head over this. I am trying to add a Prefix or Suffix (i.e £ to price field) (kg to weight field) Ideally, using a grep to add a prefix to a paragraph style unless this option is built in somewhere. Also, the field is from a csv file so its a data merge.

I have lots of csv files so it's would be easier to add (Prefix or Suffix) on import?