I want to add an additional field (in Magento's built-in cash-on-delivery method) for Upfront Fee right below the Subtotal. This Upfront Fee would be displayed OR calculated ONLY when the subtotal is greater than
$250. If the subtotal is greater than
$250 this Upfront Fee will get calculated as 20% of whatever the Subtotal amount is i.e >
How can i do this>?
Do i need a module or what?
It is one minute game in PHP we just have fetch value,define condition and echo the result but i have no clue about how to do this in Magento.