Single Price Grid Component

I'm not sure if it's just me but there seemed to be so many inconsistencies with font sizes/line heights/margins that I just gave up at one point and submitted it anyway. My media query felt as if I was just patching it up rather than adjusting for a larger screen.

It's close enough anyway that I'm happy with it. Haven't really done much grid before so I think it works - plus the transition from mobile to desktop seems smooth.