Multi-dimensional filter

Hi, I am relatively new to EazyBI and have been using the sample reports and this user group throughout with great success to date!
However, I am struggling to compose what I suspect to be a rather simple report filter (calculated measure) using two dimensions: [Issue Type] and [Label].

I need to filter a report where:
[Issue Type] = A
OR
([Issue Type = B] AND ([Label] = “X” or [Label] = “Y”))

Hope that makes sense