Linking a text variable to a specific instance in a linear pattern

Good morning all. 

Is there any way to link a specific instance in a linear sketch pattern to an equation so I can have tool numbers be sequential when I do my linear pattern. In the picture where it says 015-005-B1 I would like it to update and say B2, B3, B4 an so on when I pattern it. I will add a picture and I am using Solidworks 2020 Standard. 

Thank you, 

SolidworksParts And Features