Pizza_delivery.py

print("Welcome to python pizza delivery!")
bill=0
size=input("What size of pizza do you want? S,M or L: ")
if size == "S":
    bill+=15
elif size == "M":
    bill+=20
elif size == "L":
    bill+=25
else:
    print("You typed a wrong input.")

pepperoni=input("Do you want pepperoni?: Y or N: ")
if pepperoni == "Y":
    if size == "S":
        bill+=2
    else:
        bill+=3

extra_cheese=input("Do you want extra cheese?: Y or N: ")
if extra_cheese == "Y":
    bill+=1

print(f"Your final bill is: ${bill}")