[RELEASED] Price per m2 and Custom Formulas

Price per m2 and Custom Formulas
This two extensions allow to manage simple square meters or inches calculations, for example width x height, and complex custom formulas for advanced users.
Includes textbox number checking, price-update-onthefly, and more options...

Suggestions are welcome!

- PPM (Price per meters & square meters)
http://www.opencart.com/index.php?route ... search=ppm

- CFO (Custom Formulas)
http://www.opencart.com/index.php?route ... on_id=7418


Please visit our demo store to see they working.
http://esponi.xtrweb.com

Admin zone (demo / demo)
http://esponi.xtrweb.com/admin