Is there a way to show a “charge per item” on a bill?
No, but that information can be determined from the Bill Summary page in View (this option must be enabled on the Optional Documents tab at Setup > Options).
The Billing tab option Show forms, number of forms, and charges per form (at Setup > Options) displays the Charge per Form, if there are multiple copies of the same form, but it does not display a per item charge. In the BILL page example below, Schedule A is charged per item and Schedule C is charged per form. The # of Forms column indicates one Schedule A and two Schedule C forms were prepared.
The number of items and the total charge is displayed on the Bill Summary page. From this you can determine that the per item charge for Schedule A in this example is $15:
