I can understand the impulse to not want to waste those coins.
If you are having trouble keeping food on your counters, it makes sense to keep them. A customer coming in and paying 1 coin for a dish gets you more than if they left empty handed.
But if you've got plenty of food on your counters, if it were me, I'd sell the counter. Here's why:
Say you get on average 900 customers a hour. (That seems to be what people are typically seeing)
That's 21,600 customers/day and a total of 21,600 potential plates to make money every day. If your other counters have on average 8 coin dishes, every time a customer gets a 1 coin dish instead of an 8 coin dish, you're missing out on 7 coins potential earnings for that day.
If just 10% of your customers get a 1 coin dish instead of an 8 coin dish, that's 7 x 10% x 21,600, or 15,120 coins you missed out earning for that day. And you still have around 17,000 1 coin dishes on your counter, so you're going to miss out earning that potential 15,000 coins the next day, and the next, and the next, etc etc.
Over a week, you will have earned about 100,000 fewer coins by holding on to that lemon mousse counter.
So if you really are in need of coins quickly, it makes more sense to sell the counter than to keep it.
Your exact results may be different, depending on the exact mix of food on your counters, size of your bakery, volume of customers.
I totally get that it's hard to consider just tossing out that hard earned food and the 19,000 coins, but if you do the math you'll probably find out you'll wind up ahead in a day or so by selling that mousse counter.