AR: Functional Tax calculated from Functional Amount rather than from Converted Line Tax amount

Hello, 

Is it possible to make Receivables use the Functional Line amount to calculate the Functional Tax amount on a line, instead of the Converted Entered Tax Amount for use on GL Distributions?

For Example:

Functional Currency = ARS

TRX Entered Currency = USD

Exchange Rate = 5.6789

As it works today:

USD Line Amount = 111.11 (USD)

Therefore Functional (ARS) Line amount = 111.11 * 5.6789 = 630.98 (ARS)

Line Tax Rate = 21%

Entered Tax Amount = 111.11 @ 21% = 23.33 (USD)

Therefore Functional (ARS) Tax amount is calculated for the GL distribution as: 23.33 * 5.6789 = 132.49 (ARS) **

Can the Tax be calculated using the Functional Line amount, as per:

630.98 (ARS) * 21% = 132.51 (ARS) **

**As you can see (in this instance), there is a difference of 0.02 between the ARS tax amounts and this is what we would like to avoid.