You can now pay for Troop dues, campouts, etc using your Paypal account or any major debit/credit card. A Service Charge of 4% is added to cover the additional fees associated with accepting credit cards (shown as tax).
Below are the activities that you can currently pay for:
Troop dues are $110 for the full year.
Note that BSA has raised their dues so the Troop dues have also increased.