MAC Matters: Building a Core MAC Collection with (less than) $21 a Month!

I Bought It/Affiliate Link It is time for a long-awaited MAC Matters update!  For those of you who are new to this series, here is the scoop: What is "MAC Matters"? This series was born when I realized that I could build up a great MAC Core Collection with (less than) the cost of my most expensive monthly beauty sample subscription. So, I cancelled said subscription and put my theory