Usually in restaurants where all the of the goods are individually prepare / served. Many cafes sell also beans and other merchandise that are manufactured or

Usually in restaurants where all the of the goods are individually prepare / served. Many cafes sell also beans and other merchandise that are manufactured or made in batches, and can be $20 per item. So tipping on those items would be similar than you tipping in grocery stores or other stores that sell goods. Like you buy a $20k car, do you tip them 20%? Personally, I always just change the default calculation and tip on the service items like $1 for coffee/drink.