I found an answer on how to remove commas between quotes of a comma delimited csv file over here on stackexchange (cannot comment there as I don't have the needed rep).
awk -F'"' -v OFS='' '{ for (i=2; i<=NF; i+=2) gsub(",", "", $i) } 1' infile
How can I redirect the output to a file instead of printing it to the console?
I tried various combinations of using '>' which only gave me empty files or errors. '>>' gave me an error every time.