Simple cart to buy time credits
I have a membership based site and would like to extend the service by introducing a credit purchase system enabling users to buy periods of time and attributing the period to their account.
For example; user A logs in and buys Credit Option A (90 days access at GBP5.00)
Can eCart fulfil this simple task?
(I'd be using a paypal account to process the transaction)
If so, what woulsd be my approach?