penalty for a Felony in the Third Degree under Florida Law is:
5 years jail and/or $5,000 fine.
That is the maximum amount. For first time offenders it is likely to be far less.
The girls should make restitution to the business they stole from before they have to go to court
. This means giving back the property (if they still have it) or paying for its value (if it was confiscated by the police). If they can show that they have already done this when they go to court, it will portray them favorably.
It's likely that the girls will get sentenced to some jail time, but it will probably be suspended. This means that they will not have to actually go to jail unless they get into trouble while they are on probation.
They will likely be sentenced to pay fines and court costs, which could be upwards of $1,000. It is also likely that some of the fines would be suspended as witht the jail time.
There might be a way of avoiding some fines/jail sentence
, if they volunteer to do a significant amount of community service.
The girls should each get an attorney to make sure they are represented effectively. If they can't afford one, they can apply for a court appointed attorney.