Brink does not include taxes received, but does include discounts. Crunchtime includes taxes but not the discounts.
As an example:
Brink: $2394.97 (gross) + $161.03 (tax) – 94.27 (discount) = $2461.73 (Crunchtime Gross)
Crunchtime: 2461.73 (gross) -161.03 (tax) + 94.27 (discount) = 2394.97 (Brink Gross)