diff --git a/tests/unit/workflow/engine/classes/PmFunctions/PMFTotalCalculationTest.php b/tests/unit/workflow/engine/classes/PmFunctions/PMFTotalCalculationTest.php
index 1624a21b2..3b28b59ff 100644
--- a/tests/unit/workflow/engine/classes/PmFunctions/PMFTotalCalculationTest.php
+++ b/tests/unit/workflow/engine/classes/PmFunctions/PMFTotalCalculationTest.php
@@ -207,9 +207,9 @@ class PMFTotalCalculationTest extends TestCase
             ]
         ];
         $expectedArray = [
-            "0" => 20,
-            "1" => 70,
-            "2" => 10,
+            "1" => 20,
+            "2" => 70,
+            "3" => 10,
         ];
         $this->assertEquals($expectedArray, PMFTotalCalculation($grid, 'field2', 'percentile'));
     }
diff --git a/workflow/engine/classes/class.pmFunctions.php b/workflow/engine/classes/class.pmFunctions.php
index 37d40f81b..262fa78f1 100644
--- a/workflow/engine/classes/class.pmFunctions.php
+++ b/workflow/engine/classes/class.pmFunctions.php
@@ -451,7 +451,7 @@ function evaluateFunction($aGrid, $sExpresion)
  * @method
  *
  * Executes operations in the grid fields, such as sum, average, median, minimum, maximun,
- * stantard derivation, variance, percentile, count, count distinct
+ * stantard deviation, variance, percentile, count, count distinct
  * 
  * @name PMFTotalCalculation
  * @label PMFTotalCalculation Function
@@ -459,7 +459,7 @@ function evaluateFunction($aGrid, $sExpresion)
  * @param array | $grid | Grid | The input grid.
  * @param string (32) | $field | Name of field | The name of the field.
  * @param string (32) | $function | Operation.
- * @return object|array | $result | Result | Result according of the function
+ * @return int|float|array | $result | Result | Result according of the function
  *
  */
 function PMFTotalCalculation($grid, $field, $function)
@@ -540,10 +540,10 @@ function PMFTotalCalculation($grid, $field, $function)
             $arrayAux = [];
             for ($i = 1; $i <= $totalRows; $i += 1) {
                 $sum += $grid[$i][$field];
-                $arrayAux[] = $grid[$i][$field];
+                $arrayAux[$i] = $grid[$i][$field];
             }
-            for ($i = 0; $i < count($arrayAux); $i += 1) {
-                $result[] = round(($arrayAux[$i] * 100) / $sum, $floatPointNumber);
+            for ($i = 1; $i <= count($arrayAux); $i += 1) {
+                $result[$i] = round(($arrayAux[$i] * 100) / $sum, $floatPointNumber);
             }
             break;
         case "count":
diff --git a/workflow/engine/src/ProcessMaker/BusinessModel/Variable.php b/workflow/engine/src/ProcessMaker/BusinessModel/Variable.php
index 1d7f76b78..f51538af3 100644
--- a/workflow/engine/src/ProcessMaker/BusinessModel/Variable.php
+++ b/workflow/engine/src/ProcessMaker/BusinessModel/Variable.php
@@ -375,8 +375,7 @@ class Variable
      * @param string $search
      * @param string $prefix
      *
-     * @return array, return an array with data of a DynaForm
-     * @throws Exception
+     * @return array, return an array with varaibles filter by type
      */
     public function getVariablesByType($processUid, $typeVarId = 0, $start = null, $limit = null, $search = null, $prefix = null)
     {
diff --git a/workflow/engine/src/ProcessMaker/Model/ProcessVariables.php b/workflow/engine/src/ProcessMaker/Model/ProcessVariables.php
index cdb487ddd..8647380e7 100644
--- a/workflow/engine/src/ProcessMaker/Model/ProcessVariables.php
+++ b/workflow/engine/src/ProcessMaker/Model/ProcessVariables.php
@@ -76,7 +76,7 @@ class ProcessVariables extends Model
     }
 
     /**
-     * Scope a query to filter an specific type for variable
+     * Scope a query to filter a specific type for variable
      *
      * @param  \Illuminate\Database\Eloquent\Builder $query
      * @param  int $typeId
@@ -136,7 +136,7 @@ class ProcessVariables extends Model
         if (!empty($search)) {
             $query->where('VAR_NAME', 'LIKE', "${search}%");
         }
-        // orde by varNane
+        // order by varNane
         $query->orderBy('VAR_NAME', 'ASC');
         // Check if we need to add a pagination
         if(!is_null($start) && !is_null($limit)) {
diff --git a/workflow/engine/src/ProcessMaker/Services/Api/Project/Variable.php b/workflow/engine/src/ProcessMaker/Services/Api/Project/Variable.php
index 46bbd585b..af3772de1 100644
--- a/workflow/engine/src/ProcessMaker/Services/Api/Project/Variable.php
+++ b/workflow/engine/src/ProcessMaker/Services/Api/Project/Variable.php
@@ -3,9 +3,9 @@ namespace ProcessMaker\Services\Api\Project;
 
 use Exception;
 use G;
+use Luracast\Restler\RestException;
 use ProcessMaker\BusinessModel\Variable as BmVariable;
 use ProcessMaker\Services\Api;
-use Luracast\Restler\RestException;
 
 /**
  * Project\Variable Api Controller
@@ -33,6 +33,8 @@ class Variable extends Api
     }
 
     /**
+     * Get variables by type
+     * 
      * @url GET /:prj_uid/process-variables/:typeVariable/paged
      *
      * @param string $prj_uid {@min 32}{@max 32}