12. Trade Commissions

town = input()
sum = float(input())

if town == "Sofia":
    if 0 < sum <= 500:
        print(f'{0.05 * sum:.2f}')
    elif 500 < sum <= 1000:
        print(f'{0.07 * sum:.2f}')
    elif 1000 < sum <= 10000:
        print(f'{0.08 * sum:.2f}')
    elif sum > 10000:
        print(f'{0.12 * sum:.2f}')
    else:
        print('error')

elif town == "Varna":
    if 0 < sum <= 500:
        print(f'{0.045 * sum:.2f}')
    elif 500 < sum <= 1000:
        print(f'{0.075 * sum:.2f}')
    elif 1000 < sum <= 10000:
        print(f'{0.1 * sum:.2f}')
    elif sum > 10000:
        print(f'{0.13 * sum:.2f}')
    else:
        print('error')

elif town == "Plovdiv":
    if 0 < sum <= 500:
        print(f'{0.055 * sum:.2f}')
    elif 500 < sum <= 1000:
        print(f'{0.08 * sum:.2f}')
    elif 1000 < sum <= 10000:
        print(f'{0.12 * sum:.2f}')
    elif sum > 10000:
        print(f'{0.145 * sum:.2f}')
    else:
        print('error')
else:
    print('error')