pop up problem

Must show all work

Kim and Mei are selling cookie dough for a school fundraiser.  Customers can buy packages of chocolate chip cookie dough and packages of oatmeal cookie dough.  Kim sold 6 packages of chocolate chip cookie dough and 4 packages of oatmeal cookie dough for a total of $122.  Mei sold 2 packages of chocolate chip cookie dough and 6 packages of oatmeal cookie dough for a total of $106.  What is the cost each of one package of chocolate chip cookie dough and one package of oatmeal cookie dough?