With one tax rule, everything works fine and calculates correctly but if I add another tax rule, it doesn't calculate properly. Now, if the number were calculated higher, I wouldn't mind too much 
but unfortunately, I'm always short a bit on the tax amount which means I would have to pay out of company expenses. Here's what I mean...With only 1 tax rule - works perfectly:
With two tax rules...
... it doesn't calculate correctly...
... but it should calculate as follows...
($20.00 x 1.12) + $15.00 = $37.40
Not sure what I'm doing wrong...
