diff --git a/resources/views/pages/pdfs/purchase_order_table.blade.php b/resources/views/pages/pdfs/purchase_order_table.blade.php
index a662792c..24453912 100644
--- a/resources/views/pages/pdfs/purchase_order_table.blade.php
+++ b/resources/views/pages/pdfs/purchase_order_table.blade.php
@@ -79,7 +79,21 @@
         </tr>
     @endif
     @php
-        $displayedTotal = bcadd(bcadd(bcadd($displayedSubtotal, $serviceCharge, 5), $transaction->tax, 5), $voucherDiscount, 5);
+        $displayedSubtotal = is_numeric($displayedSubtotal) ? sprintf('%F', $displayedSubtotal) : '0';
+        $serviceCharge = is_numeric($serviceCharge) ? sprintf('%F', $serviceCharge) : '0';
+        $tax = is_numeric($transaction->tax) ? sprintf('%F', $transaction->tax) : '0';
+        $voucherDiscount = is_numeric($voucherDiscount) ? sprintf('%F', $voucherDiscount) : '0';
+
+        $displayedTotal = bcadd(
+            bcadd(
+                bcadd($displayedSubtotal, $serviceCharge, 5), 
+                $tax, 
+                5
+            ), 
+            $voucherDiscount, 
+            5
+        );
+
         $expectedTotal = bcadd(bcadd(bcadd($subtotal, $serviceCharge, 5), $transaction->tax, 5), $voucherDiscount, 5);
         $discrepancy = bcsub($expectedTotal, $displayedTotal, 5);
         $total = bcadd(bcadd(bcadd($subtotal, $serviceCharge, 5), $transaction->tax, 5), $voucherDiscount, 5);