PayPal produces a handy 2-page "Annual financial Summary" Report that has a line item not only for your total PayPal income but also for total refunds and PayPal fees paid. You can also run PayPal transaction reports on the keyword USPS to get your total postage purchased.
To get your total eBay fees, you need to open your eBay invoices in My eBay > Account tab > Summary. You can open just half of them, since each invoice includes the previous month's total at the top.
