Calculation of Total is not properly saved when Tax is inclusive

[vrlk]

Steps:

1. Add a inclusive tax with 15%
2. Add a service with 5000 Amount Treatment.
3. Here the Subtotal: 4347.83, Inclusive Tax: 652.17, Total: 5000
4. Save it and open it again.

   Expected Result:

It should be saved as according to the correct calculation.

Actual Result:

Saved incorrectly: Subtotal: 3780.87, Service Tax: 567.13, Total: 4348

[vrlk]

this issue reproduced in current build.