A report which will list the item payments deposited in a given date range. For each item, the total of it's sales, tax, discounts, and refunds will be aggregated.
User can change the date range. It's probably simplest to let the user pick a month instead of manually inputing a start and end date, but we may need to allow for that as an override in order to summarize over longer or shorter date ranges.
User can optionally specify a payment method to further filter the payments being aggregated.
As a potential future feature, give users the ability to assign account numbers to each of their items. For example, assigning the account number "001" to the Monday Night Men's league. Allow for re-use of account numbers between seasons (copy it when copying the league).