Trade Commissions

town = input()
sales = float(input())

commission = 0
if town == "Sofia":
    if 0 <= sales <= 500:
        commission = sales * 0.05
    elif 500 < sales <= 1000:
        commission = sales * 0.07
    elif 1000 < sales <= 10000:
        commission = sales * 0.08
    elif sales > 10000:
        commission = sales * 0.12
    else:
        print("error")
if town == "Varna":
    if 0 <= sales <= 500:
        commission = sales * 0.045
    elif 500 < sales <= 1000:
        commission = sales * 0.075
    elif 1000 < sales <= 10000:
        commission = sales * 0.1
    elif sales > 10000:
        commission = sales * 0.13
    else:
        print("error")
if town == "Plovdiv":
    if 0 <= sales <= 500:
        commission = sales * 0.055
    elif 500 < sales <= 1000:
        commission = sales * 0.08
    elif 1000 < sales <= 10000:
        commission = sales * 0.12
    elif sales > 10000:
        commission = sales * 0.145
    else:
        print("error")
if (commission > 0) and (town == "Sofia" or town == "Varna" or town == "Plovdiv"):
    print(f"{commission:.2f}")
else:
    print("error")