Issues with inclusive tax calculation

[sausin]

Steps to reproduce the issue

1. Create two tax rates (inclusive type, for eg 5%)
2. Create a bill (for eg. $110)
3. Add two inclusive rates
4. See tax calculation

Expected result

Expect to see tax of $10 in total ($5 corresponding to each tax slab) and subtotal of $100

Actual result

Only half the tax is calculated and that too is incorrectly calculated.

System information (Akaunting, PHP versions)

Akaunting - 1.3.4
PHP - 7.2.10

Additional comments

The tax calculation should sum up all the rates for inclusive type and calculate the base price. The taxes should then be calculated over this base price and also be summed together.

[sausin]

As an additional comment, there should probably be a limitation on different tax types being used together. For eg. if inclusive and normal type tax types are added - it would be a bit of a mess wrt calculation of base price