variable amount in paypal recurring

I need to implement monthly subscription with variable amount with paypal recurring system. problem is that monthly subscription fee is changable by adminis开发者_高级运维trator. is it posssible to change automated recurring amount in paypal?

In paypal, subscribe and unsubscribe recurring methods does not have variable amount.

With Automatic Billing and Adaptive payement system it is possible.(i never done that)