#mark counting with condition ( +=, *=, -=, /=) / 按照情況予分
bill = 0
size = input("plz choose a size,S,M,L").lower()
if size == 's':
    bill += 15
elif size == 'm':
    bill += 20
else:
    bill += 25
print(bill)



720e1e6b1ac65164220b4e5c1022789ebad5a245
<mask token>

<mask token>
if size == 's':
    bill += 15
elif size == 'm':
    bill += 20
else:
    bill += 25
print(bill)

bill = 0
size = input('plz choose a size,S,M,L').lower()
if size == 's':
    bill += 15
elif size == 'm':
    bill += 20
else:
    bill += 25
print(bill)

#mark counting with condition ( +=, *=, -=, /=) / 按照情況予分
bill = 0
size = input("plz choose a size,S,M,L").lower()
if size == 's':
    bill += 15
elif size == 'm':
    bill += 20
else:
    bill += 25
print(bill)


