Trade_comissions

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

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