fruit shop

fruit, day, quantity, total_price, days_prices = input(), input(), float(input()), 0, {'days': [['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'], ['Saturday', 'Sunday']],'prices': {"banana": [2.5, 2.7], 'apple': [1.2, 1.25], 'kiwi': [2.7, 3], 'orange': [0.85, 0.9],'grapefruit': [1.45, 1.6], 'pineapple': [5.5, 5.6], 'grapes': [3.85, 4.2]}}
total_price = quantity * days_prices['prices'][fruit][0] if fruit in days_prices['prices'] and day in days_prices['days'][0] else quantity * days_prices['prices'][fruit][1] if fruit in days_prices['prices'] and day in days_prices['days'][1] else 0
print('error') if total_price == 0 else print(f'{total_price:.2f}')