There is no "typical range." That is an idea the insurance companies hope you will grasp onto. The truth is: every person and every injury is different. Before settling your claim, you should fully understand 1) your total past and future expenses, 2) your medical prognosis, and 3) where the settlement funds must go (e.g. do you have to pay providers or insurers out of that amount?.
I'm not a licensed attorney in your state, but in my experience I would advise that assuming you have time remaining on your statute of limitations, you should seek clarification on your injuries, prognosis, and projected future care needs before accepting a settlement offer. So the third option in your scenario is to continue negotiations. Best of luck to you.