Index: ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java
===================================================================
diff -u -r30614 -r30615
--- ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java	(.../Invoice.java)	(revision 30614)
+++ ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java	(.../Invoice.java)	(revision 30615)
@@ -618,7 +618,11 @@
 	@Transient
 	public void updatePrintStatus(ObjectDao dao){
 		
-		int totalAmount = getInvoiceItem().size();
+		int totalAmount = 0;
+		for(InvoiceItem item : getInvoiceItem()){
+			int amount = item.getAmount() == null ? 0 : item.getAmount().intValue();
+			totalAmount += amount;
+		}
 		
 		int printedCount = 0;
 		for(InvoiceItem item : getInvoiceItem()){