Hi
You have many pages where they offer information on labor costs,
https://m.electroinstalador.com/contenidos/costos-mano-obra.html
other
http://www.aiet.org.ar/www/index.asp?secc=port&nom=Portada
one more
https://aaieric.org.ar
compare all three and get an average that seems appropriate ..... luck
Cheers