i have set up the store at: http://at-tazkiyah.com/RJ2/index.php/subscribe
for each of my items, i have created options for their prices.
i also need an option for "donation" where the user is able to input a custom amount they wish to donate along with their purchase.
this could be on the actual item page (where they can add it to the cart) or on the checkout page.
currently i have used the options feature dropdown for the donation, but this limits me to amounts which i have specified.
i know there would be some coding envolved, what do i need to do please?