**Introduction**

The **Variable Math element** is great for products and services that require you to customize the math of a product or service using variables. For example: $productOne x $productTwo / 30

**Benefits, Features & Use Cases**

**Shipping Rates****-**Calculate prices**based on the length, width, and height of a shipping item**Calculate a monthly fee**Mortgage Calculator -**Add an interest (percentage) to the number of days or months the user wants to borrow money**Loan Calculator**-Give your customer a discount based on combing items together. Please take a look at the video below.**Package Deals**-**Square Footer**- Please take a look at the video below.- ROI Calculator - video coming soon

**How to Activate & Use This Feature**

To add Variable Math, first click the **"+Add Element"** button

Then click on the **"Variable Math"** button

**Settings & Options**

First, you can create a title for the element.

Now, let's dive into the interesting stuff... By default, the Variable Math element creates 2 products that you can change or customize easily.

You can change the product's name, value in price, max quantity and a type of front-end element to control this product.

You can also click on the "+Add Item" button to add more products

Now, here it comes the real power of the Variable Math element. With the "Total Calculation" field, you can create math operations (+, -, *, /) to operate with all the products/services you created.

For instance, in the next image we are calculating the shipping cost based on the product dimension (width, height, length)

And we are multiplying each value to get the total calculation:

And this is the end result:

Mind-blowing, huh?

**Linking Element Values**

In the latest versions of Stylish Cost Calculator, you can link other elements as a variable in Variable Math. The calculated value of the element will be the value returned by the variable. Use the "[+] Link Element" button to add an element as a variable.

You can also add a section's total to the variables list.

**Writing Formulas**

You can write formulas in a JavaScript like syntax, use * to multiply the variables. Here are some sample formulas.

Input1 * (1.15)

The above code will add 15% to the value of Input1

**Advanced Options of Variable Math**

**Default 0 Value: **Enabling this option will set the value of variables that have not returned any value set to 0 and will let the formula execute. If not enabled, the formula will not execute until all of the variables becomes available.

We would like to encourage you to try it out. Many users find solutions to complex problems that didn't even occur to us.

**Video Tutorials**

**Creating Package Deals**

**Working with Square Footage**

**Additional Information**

**Special Notes**

You may want to read about our **Custom Math** element that is used for triggering fees/discounts, charging base fees, adding percentages to the end of your total, converting totals to monthly pricing, and much more.

**Related Features**

Element: Custom Math https://designful.freshdesk.com/support/solutions/articles/48001142309-element-custom-math

**Limitations**

**WooCommerce Shipping Functionality** - SCC will not pay the fee to a shipping option in WooCommerce. We recommend you use the shipping rate functionality of WooCommerce that is built-in.