diff --git a/ui/src/pages/ProductionProductCostingHasCostDetail.vue b/ui/src/pages/ProductionProductCostingHasCostDetail.vue
index 562b0c3..c0922f3 100644
--- a/ui/src/pages/ProductionProductCostingHasCostDetail.vue
+++ b/ui/src/pages/ProductionProductCostingHasCostDetail.vue
@@ -469,7 +469,7 @@
             </span>
           </div>
           <div class="sub-right pcd-sub-right-clickable" @click="toggleGroup(grp, gi)">
-            Grup Toplami TRY: {{ formatBarMoney(groupTotals[gi]?.tryTotal) }} | USD: {{ formatBarMoney(groupTotals[gi]?.usdTotal) }}
+            Grup Toplami TRY: {{ formatBarMoney(groupLiveTotals[gi]?.tryTotal) }} | USD: {{ formatBarMoney(groupLiveTotals[gi]?.usdTotal) }}
             <q-icon
               :name="isGroupOpen(grp, gi) ? 'expand_less' : 'expand_more'"
               size="18px"
@@ -1116,7 +1116,7 @@ const canReadOrder = canRead('order')
 const detailLoading = ref(false)
 const detailError = ref('')
 const detailGroups = ref([])
-const groupTotals = ref([])
+const groupTotalsRevision = ref(0)
 const detailHeader = ref(null)
 const costDate = ref('')
 const exchangeRates = ref(createEmptyExchangeRates())
@@ -1578,6 +1578,21 @@ const toolbarSummary = computed(() => flatDetailRows.value.reduce((acc, row) =>
   gbpTotal: 0
 }))
 
+const groupLiveTotals = computed(() => {
+  // Explicitly depend on inline-edit events as QTable can update a row without
+  // invalidating computations owned by the parent component.
+  void groupTotalsRevision.value
+  return detailGroups.value.map(group => (
+    (Array.isArray(group?.items) ? group.items : []).reduce((acc, row) => {
+      if (!shouldIncludeRowInGroupTotal(group, row)) return acc
+      acc.tryTotal += resolveRowTRYTutar(row)
+      acc.usdTotal += resolveRowUSDTutar(row)
+      acc.quantity += resolveNumericRowQuantity(row)
+      return acc
+    }, { tryTotal: 0, usdTotal: 0, quantity: 0 })
+  ))
+})
+
 const summaryOpen = ref(false)
 
 function makeEmptySummaryRow (part) {
@@ -2887,22 +2902,9 @@ function shouldIncludeRowInGroupTotal (grp, row) {
   return normalizeBooleanFlag(row?.maliyeteDahil ?? row?.maliyete_dahil ?? row?.Maliyete_dahil)
 }
 
-function syncGroupTotals () {
-  groupTotals.value = detailGroups.value.map(group => (
-    (Array.isArray(group?.items) ? group.items : []).reduce((acc, row) => {
-      if (!shouldIncludeRowInGroupTotal(group, row)) return acc
-      // Sub-header must mirror the amounts already rendered in the row.
-      acc.tryTotal += parseMoneyInput(row?.lTutar)
-      acc.usdTotal += parseMoneyInput(row?.usdTutar ?? row?.lTutarUSD)
-      acc.quantity += resolveNumericRowQuantity(row)
-      return acc
-    }, { tryTotal: 0, usdTotal: 0, quantity: 0 })
-  ))
-}
-
 function resolveGroupQuantity (grp) {
   const groupIndex = detailGroups.value.indexOf(grp)
-  return groupIndex >= 0 ? parseMoneyInput(groupTotals.value[groupIndex]?.quantity) : 0
+  return groupIndex >= 0 ? parseMoneyInput(groupLiveTotals.value[groupIndex]?.quantity) : 0
 }
 
 function groupKey (grp, gi) {
@@ -3278,10 +3280,7 @@ function onRowQuantityInput (row, value) {
 }
 
 function triggerUIUpdate () {
-  syncGroupTotals()
-  nextTick(() => {
-    syncGroupTotals()
-  })
+  groupTotalsRevision.value += 1
 }
 
 function normalizeRowQuantityDisplay (row) {
@@ -5220,18 +5219,6 @@ watch(
   }
 )
 
-watch(
-  [detailGroups, exchangeRates],
-  () => {
-    syncGroupTotals()
-  },
-  {
-    deep: true,
-    flush: 'sync',
-    immediate: true
-  }
-)
-
 onMounted(() => {
   if (!canReadOrder.value) return
   fetchDetail()