ehh what a pain. I assume you build that extra cost in.
Do they pay with all separate checks with 14 digit check numbers too like ours does?
I know that customers that used to buy $18 trophies now buy $5 medals. In the restaurant biz they call that statistic PPA (Per Person Average) How many people did you server divided into your total sales.
If you make 15% then you would rather work at a fancypants steakhouse where the PPA is $75 versus El Chico's with a $10 PPA. At the steak house you can sell $1000 a night and only server 15 people. Mr. Waiter makes $150. BUT at El Chicos he has to wait on more than 100 people AND, his average tip is probably lower (13% maybe versus 18%) This is whay lowballer sign companies die... they have to work alot harder to make the same money!
This is why restaurants like to upsell... they are only going to see so many customers per night, so you need to get them for as much as you can. A side of sour cream, a loaded baked potato, sauteed mushrooms on your steak, and one dessert can add $10-15 to the tab PLUS give the guest an enhanced experience (fat+sugar=yummy) so they leave happy and come back again.
An analogy for us...
Try this one: When you sell a banner to a retail customer also make them a decal of the banner design. More than you would think it turns into an order for the decals! Whenever you do a proof for someone also show them their design in a couple other formats. If they bought coros then show them how it looks as a door magnet and/or a t-shirt. I recently added $600 to a ticket for t-shirts by showing them the layout as a bumper sticker as well when I sent the proof. It took 5-10 minutes extra and made me a few hundred extra dollars. I didn't even have to make them! I send the file to Stouse and they blind shipped them to the customer. EZ Money!
Try to raise your PPA!