Fix quotes unit multiplier calculation

Author: nicholas-maestrello

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Fixed originalSubtotal calculation to include unitMultiplier in QuoteDetails and QuoteChildren
+
 ## [3.0.6] - 2026-01-29
 
 ### Changed

react/components/QuoteDetails/QuoteChildren.tsx

@@ -25,6 +25,7 @@ interface Props {
   permissions: string[]
   usingParentQuote: boolean
   usingQuoteChild?: string
+  unitMultipliers?: Record<string, number>
 }
 
 const QuoteChildren: React.FC<Props> = ({
@@ -34,6 +35,7 @@ const QuoteChildren: React.FC<Props> = ({
   permissions,
   usingParentQuote,
   usingQuoteChild,
+  unitMultipliers,
 }) => {
   const { culture, navigate } = useRuntime()
   const intl = useIntl()
@@ -62,9 +64,12 @@ const QuoteChildren: React.FC<Props> = ({
   const originalSubtotal = useMemo(
     () =>
       (items ?? []).reduce((acc, item) => {
-        return acc + item.price * item.quantity
+        const multiplier =
+          unitMultipliers?.[item.id] ?? item.unitMultiplier ?? 1
+
+        return acc + item.price * item.quantity * multiplier
       }, 0),
-    [items]
+    [items, unitMultipliers]
   )
 
   const discount = useMemo(

react/components/QuoteDetails/QuoteDetails.tsx

@@ -606,7 +606,8 @@ const QuoteDetails: FunctionComponent = () => {
     }
 
     const price = quoteState.items.reduce(
-      (sum: number, item: QuoteItem) => sum + item.price * item.quantity,
+      (sum: number, item: QuoteItem) =>
+        sum + item.price * item.quantity * (unitMultipliers[item.id] ?? 1),
       0
     )
 
@@ -916,6 +917,7 @@ const QuoteDetails: FunctionComponent = () => {
                       usingQuoteChild={usingQuoteChild}
                       handleUseQuote={handleUseQuote}
                       permissions={permissions}
+                      unitMultipliers={unitMultipliers}
                     />
                   ))
                 ) : (