just calculating coffee beans here.
1 grande Starbucks americano (ice/hot), typically $3-4 globally now, comes with 3 shots. (Tall has 2 shots)
1 shot = 7 grams of coffee beans
1 grande americano has 21 grams of coffee beans
just bought some beans (illy, Arabica, Etiopia). Price may wary, but for 250g it’s ~$10-15
250g can make 10-12 serves of previously calculated grande americano
each serve (grande americano) costs ~$1 of coffee beans
using larger bags of cheaper beans, e.g. $55.5 for 2260g (see below), each serve of grande americano uses ~$0.5 coffee beans
Again, lots of stuff come into play: convenience, time, other ingredients, logo, etc.
Starbucks item prices: https://www.fastfoodprice.com/menu/starbucks-prices/ (Grande americano is $3.45)
Tall latte price globally