I have created a small pen here →
I have glanced almost everything that I read here today W3S
My intention is to change the amount on the basis of the selection.
But I got stuck at this line →
I think this is not going to be simple - some mathematics is involved. Please guide me how to or perhaps suggest me ay further reading.
I promptly thank you for all the help.
Addendum: I have added a set of
data-value probably that will be helpful.