It's 25.

1: 3 bottles. 10, 10, 10= 30.
2: bottle + 2 burger. 10, 5, 5= 20.
3: burger + 2 beer. 5, 2, 2= 10.

4: burger + beer * bottle
beer * bottle is done first so 2*10=20

• the burger (5) = 25