Custom fields text input price per letter not updating

[jike1985]

Hi all

Just wondered if anyone had any suggestions. I've setup a custom field text input for a variety of my products that require name input. Ideally I'd like to price these by the letter and have therefore checked the field in the custom field settings "price per letter".

This however has no impact and the price just feeds from the product page as if that is the total price. I just wondered whether anyone had any suggestions to make the price update as the input box itself is working fine (and flowing through to the order form). I wasn't sure if it was the way I'd setup the prices such that there's an override where it just takes the total price rather than assuming the price is per letter already?

Any suggestions would be much appreciated!