diff --git a/calculator.js b/calculator.js
index 3e5744c..ba15ae2 100644
--- a/calculator.js
+++ b/calculator.js
@@ -5,6 +5,11 @@
  * @variable PRIVATE { Number } `total`
  * @return {object} `calculator` object that can be used
  */
+var calculatorModule = function() {
+  var memory = 0;
+  var total = 0;
+return {
+
 
 
   /**
@@ -12,54 +17,107 @@
    * @param  { Number } x
    * @return { Number }    current total
    */
-
-
+   
+
+load: (num) => {
+    if(typeof num === 'number') {
+      total = num; 
+      return num;
+    } else {
+      throw new Error();
+    }
+  },
+ 
+  
   /**
    * Return the value of `total`
    * @return { Number }
    */
+ getTotal: () => {
+    return total;
+  },
 
 
   /**
    * Sums the value passed in with `total`
    * @param { Number } x
    */
-
+   add: (num) => {
+    if(typeof num === 'number') {
+      total = total + num;
+      return total;
+    } else {
+      throw new Error();
+    }
+   },
 
   /**
    * Subtracts the value passed in from `total`
    * @param  { Number } x
    */
 
+subtract: (num) => {
+  if(typeof num === 'number') {
+    total = total - num;
+    return total;
+  } else {
+    throw new Error();
+  }
+},
 
   /**
    * Multiplies the value by `total`
    * @param  { Number } x
    */
-
+multiply: (num) => {
+  if(typeof num === 'number') {
+    total = total * num;
+    return total;
+  } else {
+    throw new Error();
+  }
+},
 
   /**
    * Divides the value passing in by `total`
    * @param  { Number } x
    */
 
+divide: (num) => {
+  if(typeof num === 'number') {
+    total = total / num;
+    return total;
+  } else {
+    throw new Error();
+  }
+},
 
   /**
    * Return the value stored at `memory`
    * @return { Number }
    */
+recallMemory: () => {
+  return memory;
+
+},
 
 
   /**
    * Stores the value of `total` to `memory`
    */
-
+saveMemory: () => {
+  return memory = total;
+},
 
   /**
    * Clear the value stored at `memory`
    */
+clearMemory: () => {
+  return memory = 0;
+},
 
   /**
    * Validation
    */
-
+}
+}