Standardizing Tax Rounding
For a 20.30 expense, the included tax is actually 1.854. The system would round to 1.86. So, the Before Tax Amount was 18.46, giving an incorrect expense total of 20.32.
Now, for a 20.30 expense, the included tax is rounded to 1.85. The Before Tax Amount is then 18.45, giving a correct expense total of 20.30.