diff --git a/calculator.js b/calculator.js
index 3e5744c..86407df 100644
--- a/calculator.js
+++ b/calculator.js
@@ -5,6 +5,10 @@
  * @variable PRIVATE { Number } `total`
  * @return {object} `calculator` object that can be used
  */
+function calculatorModule() {
+    //creates two private variables inside this block
+    let _memory = 0;
+    let _total = 0;
 
 
   /**
@@ -12,54 +16,124 @@
    * @param  { Number } x
    * @return { Number }    current total
    */
+   function load (num) {
+    validate(num);
+    //sets private variable total equal to num
+    _total = num;
+
+    return _total;
+  }
 
 
   /**
    * Return the value of `total`
    * @return { Number }
    */
+  function getTotal (){
+//returns the current total
+    return _total;
+  }
+  
 
 
   /**
    * Sums the value passed in with `total`
    * @param { Number } x
    */
+  function add (num){
+     validate(num);
+//adds together the num value with the total
+     _total+=num;
+  }
 
 
   /**
    * Subtracts the value passed in from `total`
    * @param  { Number } x
    */
+  function subtract (num){
+    validate(num);
+//subtracts the value for num with the total
+    _total -= num;
+  }
 
 
   /**
    * Multiplies the value by `total`
    * @param  { Number } x
    */
+  function multiply(num){
+    validate (num);
+//multiplies the value for num with the total
+    _total *= num;
+
+  }
 
 
   /**
    * Divides the value passing in by `total`
    * @param  { Number } x
    */
-
+  function divide (num){
+      validate (num);
+//divides the value for num with the total
+      _total /= num;
+  }
 
   /**
    * Return the value stored at `memory`
    * @return { Number }
    */
+  function recallMemory (){
+//returns the value that is in the memory
+    return _memory;
+  }
 
 
   /**
    * Stores the value of `total` to `memory`
    */
+  function saveMemory(){
+//sets the memory equal to the total. 
+    _memory = _total;
+  }
 
 
   /**
    * Clear the value stored at `memory`
    */
+  function clearMemory(){
+      //sets the memory value equal to 0, clears it
+      _memory = 0;
+  }
 
   /**
    * Validation
    */
 
+//makes sure that only variables that are inputed are numbers not any other type
+   function validate (num){
+  
+    if(typeof num !== 'number'){
+        throw error;
+    }
+
+    else{
+     return true;
+    }
+   
+    }
+
+
+return{
+    load: load,
+    getTotal: getTotal,
+    add: add,
+    subtract: subtract,
+    multiply: multiply,
+    divide: divide,
+    recallMemory: recallMemory,
+    saveMemory: saveMemory,
+    clearMemory: clearMemory
+    }
+}
\ No newline at end of file