diff --git a/js/common/shopping/model/NumberLine.js b/js/common/shopping/model/NumberLine.js
index 6b8cbaed..d089572c 100644
--- a/js/common/shopping/model/NumberLine.js
+++ b/js/common/shopping/model/NumberLine.js
@@ -60,6 +60,8 @@ define( function( require ) {
 
   return inherit( URNumberLine, NumberLine, {
 
+    // no dispose, persists for the lifetime of the sim.
+
     /**
      * create type marker arrays, one for each type (i.e. apples, carrots, etc..)
      * @public @override
diff --git a/js/common/shopping/model/URShoppingModel.js b/js/common/shopping/model/URShoppingModel.js
index 58687a4a..96d9aaee 100644
--- a/js/common/shopping/model/URShoppingModel.js
+++ b/js/common/shopping/model/URShoppingModel.js
@@ -57,6 +57,8 @@ define( function( require ) {
 
   return inherit( PropertySet, URShoppingModel, {
 
+    // no dispose, persists for the lifetime of the sim.
+
     /**
      * create type marker arrays, one for each type (i.e. apples, carrots, etc..)
      * @public @override
diff --git a/js/common/shopping/view/URShoppingScreenView.js b/js/common/shopping/view/URShoppingScreenView.js
index bed5a7a0..76677968 100644
--- a/js/common/shopping/view/URShoppingScreenView.js
+++ b/js/common/shopping/view/URShoppingScreenView.js
@@ -293,7 +293,7 @@ define( function( require ) {
         this.numberLineNode.reset();
         this.scaleNode.reset();
         this.shelfNode.reset();
-    },
+    }
 
   } ); // inherit
 
diff --git a/js/common/view/URNumberLineNode.js b/js/common/view/URNumberLineNode.js
index af883512..c7b2ef42 100644
--- a/js/common/view/URNumberLineNode.js
+++ b/js/common/view/URNumberLineNode.js
@@ -207,6 +207,8 @@ define( function( require ) {
 
   return inherit( AccordionBox, URNumberLineNode, {
 
+    // no dispose, persists for the lifetime of the sim.
+
     /**
      * Sets length of the number line in pixels
      * @param {number} length