Trade commission / 12/5

city = input()
sales = float(input())

bonus = 0

if city == "Sofia":
    if 0 <= sales <= 500:
        bonus = sales * 0.05
    elif 500 < sales <= 1000:
        bonus = sales * 0.07
    elif 1000 < sales <= 10000:
         bonus = sales * 0.08
    elif sales > 1000:
        bonus = sales * 0.12

elif city == "Varna":
    if 0 <= sales <= 500:
        bonus = sales * 0.045
    elif 500 < sales <= 1000:
        bonus = sales * 0.075
    elif 1000 < sales <= 10000:
        bonus = sales * 0.10
    elif sales > 1000:
        bonus = sales * 0.13

elif city == "Plovdiv":
    if 0 <= sales <= 500:
        bonus = sales * 0.055
    elif 500 < sales <= 1000:
        bonus = sales * 0.08
    elif 1000 < sales <= 10000:
        bonus = sales * 0.12
    elif sales > 1000:
        bonus = sales * 0.145

if bonus > 0:
    print(f"{bonus:.2f}")
else:
     print("error")