So you want to use aMember to calculate your income? I believe it will be better to use PayPal reports for it, why not?
We could use this report also. We use both authorize and paypal... Another much need report is one which tells how long a user has been active (how many recurring subscription terms - and their total life time value as a customer (how much the average subscriber pays for the service over time...)
Unfortunately, there is restictions in aMember Pro that doesn't allow to have real ly useful report for PayPal recurring subscriptions.