Mastery: 215 and 3 Series - B215, 330, 350, 335, and 325 Learn the basic operations of the machine with practical stitches. Customers who purchase a machine from Cupcake Quilts are welcome to attend our Free Mastery classes. If you've purchased a machine elsewhere, you may attend at a fee of $25.00 an hour. With two locations to serve you it is possible to complete all your classes within a month! Call either store to sign up!