keep cents in CBE bills and prices

apps/edr-freight-api/src/modules/bookings/booking-pricing.service.ts

@@ -279,9 +279,10 @@ export class BookingPricingService {
 
     return {
       lineItems,
-      // Grand total is billed in whole currency units — fractional line sums
-      // (rate × tons can yield e.g. 260519.2) round to the nearest whole birr/USD.
-      totalAmount: Math.round(total),
+      // Grand total keeps its cents, matching the line items it sums — rounding
+      // to whole birr made the total disagree with the breakdown (135,375.61 of
+      // lines shown as a 135,376.00 total) and CBE bills this figure to the cent.
+      totalAmount: round2(total),
       currency: booking.paymentCurrency,
       usedRates: [...usedRatesMap.values()],
       appliedModifiers: ruleResult.appliedModifiers,