diff --git a/src/components/ProjectResourceSummary/ProjectResourceSummary.tsx b/src/components/ProjectResourceSummary/ProjectResourceSummary.tsx
index 6774334..5f8592a 100644
--- a/src/components/ProjectResourceSummary/ProjectResourceSummary.tsx
+++ b/src/components/ProjectResourceSummary/ProjectResourceSummary.tsx
@@ -682,7 +682,7 @@ const columns2 = [
                   </u>
                 </div>
                 <div style={infoDataStyle}>
-                  HKD ${(expenditure - expense).toFixed(2)}
+                  HKD ${(expenditure - (expense || 0)).toFixed(2)}
                 </div>
               </div>
               <div style={{ display: "inline-block", width: "33%"}}>
@@ -692,7 +692,7 @@ const columns2 = [
                   </u>
                 </div>
                 <div style={infoDataStyle}>
-                  HKD ${(expense).toFixed(2)}
+                  HKD ${(expense || 0).toFixed(2)}
                 </div>
               </div>
               <div style={{ display: "inline-block", width: "33%"}}>