Simple script

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Hi I need a very basic script made
Here is what I need.
Ability to have one clickupsell to membership (Using or
So here is a use case:

customer buy my ebook for $17
then after sale they have the ability to be in my membership site for $27 per month (they just click on button, they don't have to enter their credit card again)

if they dont' take the upsell for the $27 per month
They get a downsell for something else which is just $10 per month
So basically I need a script that has one upsell and one downlosell for membership
and can make that a one click.
I need this fast so pelase only bid if you have experience making something like this before.

Please shoot me a message with a demo you have made if you have done this before.


Skills required:
PHP, Software Architecture
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