How much cocaine does one need to do to overdose?!

Very tricky question.And,this question really has no answer due to many reasons....1.Depends on how strong the cocaine is cut,how pure it is.2. Depends on the persons tolerance,and seeing how it would be her first time? She could easily overdose on very little..depending on how pure the cocaine is.Many things depend on an actual overdose.How much is too much? Well..for many people? 1 time is never enough once they get hooked/addicted.And,when it comes to a cocaine high? That person much maintain their high by continuing to snort,shoot or smoke about every 10-20 minutes..just to maintain their high.You must try talking your friend out of doing this...and GOD only know what these dealers cut into their drugs these days...I'm trying to say..that dealers nowadays take out the pure cocaine,and replace it with other potentially deadly ingredients...chemicals,poisons and GOD only knows what else.And,it's known as a bad batch/bag...This girl has NO idea what she's getting herself into.You should do whatever you possibly can to stop her,she may end up losing her life over something stupid.You need to be there that's for sure,and if she isn't willing to take your advice? Make sure you have your cell phone with you,and also make sure that you have her parents number in case anything bad happens.They have a right to know..I'm sure this girl IS underage.GOD help you both.Remember this? Not only can a person die from a cocaine overdose.But a person can also die from buying a dirty bag.Sad.