Requirement for Manual AR Transaction where AMOUNT Only can get populated without requiring a Qty.

We are on 12.2.9 and have a requirement in Receivables where we need to enter Manual Transactions that include invoice lines without having to add in a quantity. Would like to just enter the total amount directly without quantity or unit price. Company mainly works in lbs. and doesn't want the quantity on miscellaneous invoices, etc to alter the correct quantity represented in invoices when running reports, etc... Have tried to create a dollar UOM that might not require quantity without success along with forms personalization's that aren't successful.  

Team is having to constantly add in a second line with a negative -1 in the qty field so that it doesn't impact reports, etc.