diff --git a/src/Ramcar/InvoiceCriteria.php b/src/Ramcar/InvoiceCriteria.php
index 777d188b..e6379997 100644
--- a/src/Ramcar/InvoiceCriteria.php
+++ b/src/Ramcar/InvoiceCriteria.php
@@ -7,17 +7,31 @@ use App\Entity\Promo;
 
 class InvoiceCriteria
 {
+    protected $stype;
     protected $batteries;
     protected $promos;
     protected $trade_in;
 
     public function __construct()
     {
+        $this->stype = 0;
         $this->batteries = [];
         $this->promos = [];
         $this->trade_ins = [];
     }
 
+    public function setServiceType($stype)
+    {
+        // TODO: validate service type
+        $this->$stype = $stype;
+        return $this;
+    }
+
+    public function getServiceType()
+    {
+        return $this->stype;
+    }
+
     public function addBattery(Battery $battery, $qty = 1)
     {
         for ($i = 0; $i < $qty; $i++)