We decided not to figure in any costs that could apply to all of our checking accounts when doing a comparison such as this. It's hard b/c where do you stop? If online banking costs the bank $50,000/yr, do you divide it by the number of users and include that? How do you figure in NSF fees, transfer fees, stop pays, etc.?
As far as your POS income and expense, I would ask your POS card vendor. For statements, I would ask your supply person for the cost of an envelope and the paper then add postage. Or you could take your YE P&L and divide these expense items by the number of accounts at YE. Might Google check processing costs or look at directdeposit.gov.