Design Apex for multi-currency and enterprise territory management

• Use CurrencyType and DatedConversionRate for converted amounts—not manual rates in code • Convert amounts in Apex using convertCurrency in SOQL where possible • Territory-aware queries respect sharing—without sharing only for audited system rollups • Rollups aggregated per territory slice may need batch partitioned by territory Id • Test with multiple currencies and inactive territories in sandbox • Document rounding rules aligned with finance policy • Avoid storing converted and corporate currency inconsistently on same record