I do use an option field to have a customer select an extra article to be added to a product selection made before. I do use the GravityForms add-on in WooCommerce to integrate this form in WooCommerce.
However my customer wants to insert a number of articles for each option. So the option field should ook like this:
option name1, fill in the number you want, price per each, total price for this option
option name2, fill in the number you want, price per each, total price for this option
so: subtotal-per-line=number-per-line * price-per-line
And all of the 'total price for this option' added together should be added to the base price.
Is that possible?