Issue Description

When using “Allow unit conversion” in trade agreements, the system applies currency-based rounding (e.g., 2 decimals for USD) during intermediate unit price calculations.

This leads to loss of precision and results in a final net amount that differs from the expected value when calculated using full precision across unit conversions (e.g., kg to ea).

Proposed Solution

Provide an option to:

• Delay rounding until the final amount calculation (instead of intermediate steps), or
• Allow extended precision for unit price calculations during unit conversion scenarios
• This would ensure more accurate pricing and billing outcomes, especially for scenarios requiring high precision.