this may be a bit confusing to explain but I'll do my best.
I have products in Store which have a base price and price modifiers which so far works as expected. However I also need to update the price based on user input via a text input field.
I can't use the item quantity field because of the other price modifiers, these do not change based on the number of letters but are set for each individual product.
I have also been told to use input:custom_modifier_name (https://www.exp-resso.com/docs/store/product_tag.html#inputcustom_modifier_name), and this does seem to work according to the documentation. However it is not obvious to me how this could be used to update the price.
Can anyone help me out? I've went round in a circle a few times.