It was a paid extension, but it was developed quite a long time ago and supports only the outdated version of opencart (1.5.x).
The code of extension is far away from perfect, but currently we have no resources to improve or even to maintain this version of the module further. At the same time it is still can be useful for somebody, thus we made it free. However, as a free extension, now it also comes with no warranty (and with no guaranteed support).

For all those who have already purchased this module version, our support obligations remain valid (we provide support for them as usual).

Module "Live price" is designed to dynamic online price information update on product page depending on customer selected product options.

The module features:

• compatible with all standard opencart price modificators (options, discounts, specials, taxes)
  
• works with all currencies
  
• adds new option price prefixes ( *, /, = )
  
• shows discounts with product options price modificator (options modificator applies to discount price)
  
• sums up product quantity entered on product page with product quantity already added to cart (to determine the available discount)
  
• allows to calculate the quantity of products with different combinations of options separately (optional - to determine the available discount)
  
• shows prices multiplied by quantity (optional feature - can be turned on/off on the module settings page)
  
• uses AJAX to get current price information
  
• no core files replacements (vQmod used)
  
• completely compatible with extension Related Options v. 1.8.1 or later

Demonstration:


This is OpenCart 1.5.X module version, for OpenCart 2 please use Live price for OpenCart 2

We also recommend:

• Related Options - to create combinations of related product options and set stock, price, model etc. for each combination. This functionality can be useful for sales of products, having interlinked options, such as size and color for clothes
  
• Product Options Image PRO - to set few images for each option value and show this images on the product page in dependence of selected option value.

Contact for support, questions and suggestions: support@liveopencart.com