diff --git a/src/Ramcar/TradeInType.php b/src/Ramcar/TradeInType.php
index eeb559fa..fa830be0 100644
--- a/src/Ramcar/TradeInType.php
+++ b/src/Ramcar/TradeInType.php
@@ -4,11 +4,13 @@ namespace App\Ramcar;
 
 class TradeInType extends NameValue
 {
-    const MOTOLITE	= 'motolite';
-    const OTHER   	= 'other';
+    const PREMIUM       = 'premium';
+    const MOTOLITE	    = 'motolite';
+    const OTHER   	    = 'other';
 
     const COLLECTION = [
-        'motolite' => 'Motolite',
+        'premium' => 'Premium',
+        'motolite' => 'Non-premium',
         'other' => 'Other',
     ];
 }
diff --git a/src/Service/InvoiceCreator.php b/src/Service/InvoiceCreator.php
index 89504d31..aea1d63f 100644
--- a/src/Service/InvoiceCreator.php
+++ b/src/Service/InvoiceCreator.php
@@ -37,6 +37,7 @@ class InvoiceCreator
 
     public function getTradeInRate($trade_in)
     {
+        // TODO: modify this with the prices based on size
         if ($trade_in == 'motolite')
             return self::TIRATE_MOTOLITE;