diff --git a/vendor/assets/javascripts/formula.js b/vendor/assets/javascripts/formula.js
index 2133aec4b..ae0b1de73 100644
--- a/vendor/assets/javascripts/formula.js
+++ b/vendor/assets/javascripts/formula.js
@@ -1,3 +1,6 @@
+// Copyright (c) 2014 Sutoiku, Inc.
+// The MIT License (MIT)
+
 (function webpackUniversalModuleDefinition(root, factory) {
 	if(typeof exports === 'object' && typeof module === 'object')
 		module.exports = factory();
diff --git a/vendor/assets/javascripts/parser.js b/vendor/assets/javascripts/parser.js
index f3437aa2b..d9e863faa 100644
--- a/vendor/assets/javascripts/parser.js
+++ b/vendor/assets/javascripts/parser.js
@@ -1,4 +1,6 @@
 /* parser generated by jison 0.4.15 */
+// The MIT License (MIT)
+// Copyright (c) 2012-2014 Marcin Warpechowski <hello@handsontable.com>
 /*
   Returns a Parser object of the following structure:
 
@@ -958,4 +960,4 @@ var Parser = (function(){
   }
   Parser.prototype = parser;parser.Parser = Parser;
   return new Parser;
-  })();
\ No newline at end of file
+  })();
diff --git a/vendor/assets/javascripts/ruleJS.js b/vendor/assets/javascripts/ruleJS.js
index 368c312c8..6d37f58b1 100644
--- a/vendor/assets/javascripts/ruleJS.js
+++ b/vendor/assets/javascripts/ruleJS.js
@@ -1,3 +1,6 @@
+// * Licensed under the MIT license
+// * Copyright (c) 2012-2014 Marcin Warpechowski <hello@handsontable.com>
+
 var ruleJS = (function (root) {
   'use strict';
 
@@ -914,7 +917,7 @@ var ruleJS = (function (root) {
       'ODD', 'OR',
       'PI', 'POWER',
       'ROUND', 'ROUNDDOWN', 'ROUNDUP',
-      'SIN', 'SINH', 'SPLIT', 'SQRT', 'SQRTPI', 'SUM', 'SUMIF', 'SUMIFS', 'SUMPRODUCT', 'SUMSQ', 'SUMX2MY2', 'SUMX2PY2', 'SUMXMY2',
+      'SIN', 'SINH', 'SLOPE', 'SPLIT', 'STDEVP', 'STDEVS', 'SQRT', 'SQRTPI', 'SUM', 'SUMIF', 'SUMIFS', 'SUMPRODUCT', 'SUMSQ', 'SUMX2MY2', 'SUMX2PY2', 'SUMXMY2', 'VARP', 'VARS',
       'TAN', 'TANH', 'TRUE', 'TRUNC',
       'XOR'
     ],
@@ -1040,13 +1043,44 @@ var ruleJS = (function (root) {
 
       switch (type) {
         case '+':
-          result = number1 + number2;
+          //(sci-2587) MODIFICATION TO AVOID JAVASCRIPT IEEE MANTISSA&EXPONENT FLOATS INNACURACY
+          try{
+            var number1_big = new Big(number1);
+            var result_big = number1_big.plus(number2);
+            result = parseFloat(result_big);
+          } catch(e) {
+            result = number1 + number2;
+          }
+          //MODIFICATION END
+
+          //ORIGINAL: result = number1 + number2;
           break;
         case '-':
-          result = number1 - number2;
+          //(sci-2587) MODIFICATION TO AVOID JAVASCRIPT IEEE MANTISSA&EXPONENT FLOATS INNACURACY
+          try{
+            var number1_big = new Big(number1);
+            var result_big = number1_big.minus(number2);
+            result = parseFloat(result_big);
+          } catch(e) {
+            result = number1 - number2;
+          }
+          //MODIFICATION END
+
+          //ORIGINAL: result = number1 - number2;
           break;
         case '/':
-          result = number1 / number2;
+          //(sci-2587) MODIFICATION TO AVOID JAVASCRIPT IEEE MANTISSA&EXPONENT FLOATS INNACURACY
+          try{
+            var number1_big = new Big(number1);
+            var result_big = number1_big.div(number2);
+            result = parseFloat(result_big);
+          } catch(e){
+            result = number1 / number2;
+          }
+          //MODIFICATION END
+
+          //ORIGINAL: result = number1 / number2;
+
           if (result == Infinity) {
             throw Error('DIV_ZERO');
           } else if (isNaN(result)) {
@@ -1054,11 +1088,24 @@ var ruleJS = (function (root) {
           }
           break;
         case '*':
-          result = number1 * number2;
+          //(sci-2587) MODIFICATION TO AVOID JAVASCRIPT IEEE MANTISSA&EXPONENT FLOATS INNACURACY
+          try{
+            var number1_big = new Big(number1);
+            var result_big = number1_big.times(number2);
+            result = parseFloat(result_big);
+          } catch(e) {
+            result = number1 * number2;
+          }
+          //MODIFICATION END
+
+          //ORIGINAL: result = number1 * number2;
           break;
         case '^':
           result = Math.pow(number1, number2);
           break;
+        case 'e':
+          result = number1 * Math.pow(10, number2);
+          break;
       }
 
       return result;
@@ -1232,6 +1279,22 @@ var ruleJS = (function (root) {
         error = null;
 
     try {
+      // Preprocess E-notation, eg. replaces -5.32e-3 with -0.00532
+      // Excel does it too as well, so we're good
+      formula = formula.replace(/(?:([0-9]+(\.[0-9]+)?)+(E|e)((-|\+)?[0-9]+))/g, function(expr) {
+        var spl = expr.split('E')
+        var m = helper.number(spl[0]);
+        var e = helper.number(spl[1]);
+
+        return Big(m).times(Big(10).pow(e)).toFixed();
+      })
+
+      // Preprocess the following aliases for formulas
+      // or parser won't accept them
+      formula = formula.replace('STDEV.P', 'STDEVP');
+      formula = formula.replace('STDEV.S', 'STDEVS');
+      formula = formula.replace('VAR.P', 'VARP');
+      formula = formula.replace('VAR.S', 'VARS');
 
       parser.setObj(element);
       result = parser.parse(formula);
@@ -1304,4 +1367,4 @@ var ruleJS = (function (root) {
     parse: parse
   };
 
-});
\ No newline at end of file
+});