If your child or pet is locked inside your car, a locksmith may not be your first choice due to how long it will take for them to arrive. Especially if a child is inside, call 911 and get police and fire/rescue services on the way as soon as possible.
Some of the questions to ask when calling are how long will it take for someone to get to my car’s location? If this call is outside of normal business hours, is there an emergency service or nighttime fee added? What will be the total cost for opening my car? Confirm that there are no hidden fees.
Conclusion: Final cost is unknown until the locksmith gives you a quote based on when and where they have to go to get to you.
But in the end, you are no longer locked out and only had to make a phone call. However, your wallet may be telling you to get that emergency key in place as soon as possible so this doesn’t happen again.