Correct rounding

lib/data/models/invoice_model.dart

@@ -1251,7 +1251,7 @@ abstract class InvoiceItemEntity
       if (rate == 0) {
         return 0;
       }
-      final lineTotal = total(invoice);
+      final lineTotal = total(invoice, precision);
       if (invoice.usesInclusiveTaxes) {
         taxAmount = lineTotal - (lineTotal / (1 + (rate / 100)));
       } else {
@@ -1266,9 +1266,9 @@ abstract class InvoiceItemEntity
   }
 
   double netTotal(InvoiceEntity invoice, int precision) =>
-      total(invoice) - taxAmount(invoice, precision);
+      total(invoice, precision) - taxAmount(invoice, precision);
 
-  double total(InvoiceEntity invoice) {
+  double total(InvoiceEntity invoice, int precision) {
     var total = quantity * cost;
 
     if (discount != 0) {
@@ -1279,7 +1279,7 @@ abstract class InvoiceItemEntity
       }
     }
 
-    return round(total, 2);
+    return round(total, precision);
   }
 
   bool get isTask => typeId == TYPE_TASK;

lib/ui/app/invoice/invoice_item_view.dart

@@ -1,4 +1,6 @@
+import 'package:flutter_redux/flutter_redux.dart';
 import 'package:invoiceninja_flutter/data/models/entities.dart';
+import 'package:invoiceninja_flutter/redux/app/app_state.dart';
 import 'package:invoiceninja_flutter/ui/app/lists/list_divider.dart';
 import 'package:invoiceninja_flutter/utils/formatting.dart';
 import 'package:flutter/material.dart';
@@ -24,6 +26,12 @@ class InvoiceItemListTile extends StatelessWidget {
         clientId: invoice.clientId, formatNumberType: FormatNumberType.double);
     final localization = AppLocalization.of(context);
 
+    final store = StoreProvider.of<AppState>(context);
+    final state = store.state;
+    final client = state.clientState.get(invoice.clientId);
+    final precision =
+        state.staticState.currencyMap[client.currencyId].precision;
+
     String subtitle = '$qty x $cost';
 
     if (invoiceItem.discount != 0) {
@@ -99,7 +107,8 @@ class InvoiceItemListTile extends StatelessWidget {
               title: Row(
                 children: <Widget>[
                   Expanded(child: Text(invoiceItem.productKey)),
-                  Text(formatNumber(invoiceItem.total(invoice), context,
+                  Text(formatNumber(
+                      invoiceItem.total(invoice, precision), context,
                       clientId: invoice.clientId)),
                 ],
               ),

lib/ui/invoice/edit/invoice_edit_items_desktop.dart

@@ -82,7 +82,11 @@ class _InvoiceEditItemsDesktopState extends State<InvoiceEditItemsDesktop> {
     final viewModel = widget.viewModel;
     final state = viewModel.state;
     final company = state.company;
+
     final invoice = viewModel.invoice;
+    final client = state.clientState.get(invoice.clientId);
+    final precision =
+        state.staticState.currencyMap[client.currencyId]?.precision ?? 2;
     final lineItems = invoice.lineItems.toList();
     final includedLineItems = lineItems.where((lineItem) {
       return (lineItem.typeId == InvoiceItemEntity.TYPE_TASK &&
@@ -687,11 +691,11 @@ class _InvoiceEditItemsDesktopState extends State<InvoiceEditItemsDesktop> {
                       padding: const EdgeInsets.only(right: kTableColumnGap),
                       child: TextFormField(
                         key: ValueKey(
-                            '__total_${index}_${lineItems[index].total(invoice)}_${invoice.clientId}__'),
+                            '__total_${index}_${lineItems[index].total(invoice, precision)}_${invoice.clientId}__'),
                         readOnly: true,
                         enabled: false,
                         initialValue: formatNumber(
-                            lineItems[index].total(invoice), context,
+                            lineItems[index].total(invoice, precision), context,
                             clientId: invoice.clientId),
                         textAlign: TextAlign.right,
                       ),

lib/ui/reports/invoice_item_report.dart

@@ -135,7 +135,7 @@ ReportResult lineItemReport(
             value = lineItem.notes;
             break;
           case InvoiceItemReportFields.total:
-            value = lineItem.total(invoice);
+            value = lineItem.total(invoice, precision);
             break;
           case InvoiceItemReportFields.productKey:
             value = lineItem.productKey;

lib/ui/reports/quote_item_report.dart

@@ -131,7 +131,7 @@ ReportResult lineItemReport(
             value = lineItem.notes;
             break;
           case QuoteItemReportFields.total:
-            value = lineItem.total(invoice);
+            value = lineItem.total(invoice, precision);
             break;
           case QuoteItemReportFields.productKey:
             value = lineItem.productKey;

lib/utils/formatting.dart

@@ -14,6 +14,17 @@ import 'package:invoiceninja_flutter/redux/company/company_selectors.dart';
 import 'package:invoiceninja_flutter/utils/localization.dart';
 
 double round(double value, int precision) {
+  var rounded = value;
+
+  // Workaround for floating point issues
+  if ('$value'.contains('9999999')) {
+    rounded = _round(value, precision + 1);
+  }
+
+  return _round(rounded, precision);
+}
+
+double _round(double value, int precision) {
   if (value == null || value.isNaN) {
     return 0;
   }