How much do you tip if.....

You know what, my make-up trial was free too and I was so happy with my make-up I totally forgot to tip. I put a deposit down, but I totally forgot. I was so happy, all I wanted to do was drive to my Mom's house to show her.

I made another appointment to have my eyebrows shaped and I apologized and gave her a big tip.

I would find out how much it would cost for make-up and then 15 to 20 % of that price.