What Would You Do: Charging For Extra Hair Color

How much hair color do you estimate you use per client? Do you charge more for extra product used, or eat the cost and hope it all balances out in the end? One member of our #btcfam had this question…read what she asked, then keep scrolling for advice!   “I'm a salon owner and I need advice on using more product than expected on a client. We estimate three tubes of color, but we end up going through six or so. Who is supposed to cover that cost? Do I cover and then split the cost equally with...