I don't understand, Mark. All coach f/as can be logged on to a single OSR and their sales will be recorded separately. Why do you need one per f/a? I just finished working #4 on a 3-day trip. The #2 and I used one OSR at a time for the whole 3 days. Worked beautifully, didn't take up much room on top of the cart, and the money balanced to the penny. We used it in the aisle at the point of sale, also. Didn't slow us down a bit. I understand that on the widebodies, one OSR
per cart is going to be necessary, but on the S80 and the 73, you only have one cart; so, 1 working OSR is all you need.
I would caution you not to start giving stuff away on the excuse that the OSR is not working. It's been quite awhile since I was on an a/c that didn't have a single working unit. Also, I think everyone needs to get over the "that thing slows me down in the aisle. I just enter everything right before landing" attitude. The f/as I have seen doing this just make up what they sold which defeats the inventory control/marketing research purpose of the OSR. And, if they still can't make it come out right, I've seen more than one just keep any "overage". (Yes, I did the right thing and talked with Professional Standards. No one has bothered to speak with the f/a as yet. It's not an issue that interferes with the right of senior f/as to drop all their trips.

Or, if they have, the f/a doesn't care that people know that she is a thief. She's still doing it.)
They are watching. Now, take it from someone who spent over 20 years in the computer field. They KNOW when someone enters all their sales at the end of the flight. The computer records every transaction with a time/date stamp--time entered, date entered, and by whom. If you work a 4-hour flight and there are no sales until 30 minutes before landing, they will notice. If they begin to suspect wholesale giveaways (or worse, f/as taking cash for product and then recording it as a comp), I think they are going to come down hard. Also, my "source" says that they are beginning to make note of the fact that f/as from some stations almost never have nonworking OSR problems while f/as from certain other stations always seem to have those problems.
Despite all the complaining from passengers about being gouged, nickled-and-dimed, etc, the Food for Sale program is a moneymaker. On this last 3-day the #2 and I sold about $150 worth of food and liquor just on 1 leg. In fact, the only leg where we sold nothing at all was the last leg from DFW to STL. It was a mid-afternoon flight that was a bit too early for cocktail hour.
Cashless is here to stay. It's working beautifully at other airlines. It will be in place at AA with or without certain f/as who say NEVER.