“Price tag” means committing some act of petty retribution when either IDF engages in an anti-”settler” action, or Arabs attack Jews. These acts of retribution can range from graffiti to blocking traffic (done in response to Itamar atrocity). Stupid, really. Don’t know what the soldier was asked to do, but assume that more details will be forthcoming as they are made available.
Probably training him to shoot the dogs.