fruit = str(input())
week_day = str(input())
quantity = float(input())

price = 0

if week_day == 'Monday' or week_day == 'Tuesday' or week_day == 'Wednesday' or week_day == 'Thursday' or week_day == 'Friday' or week_day == 'Saturday' or week_day == 'Sunday':
    True
elif fruit == 'banana' or fruit == 'apple' or fruit == 'orange' or fruit == 'grapefruit' or fruit == 'kiwi' or fruit == 'pineapple' or fruit == 'grapes':
    True
else:
    print("error")

if week_day == 'Monday' or week_day == 'Tuesday' or week_day == 'Wednesday' or week_day == 'Thursday' or week_day == 'Friday':
    if fruit == 'banana':
        price = 2.50
    if fruit == 'apple':
        price = 1.20
    if fruit == 'orange':
        price = 0.85
    if fruit == 'grapefruit':
        price = 1.45
    if fruit == 'kiwi':
        price = 2.70
    if fruit == 'pineapple':
        price = 5.50
    if fruit == 'grapes':
        price = 3.85

if week_day == 'Saturday' or week_day == 'Sunday':
    if fruit == 'banana':
        price = 2.70
    if fruit == 'apple':
        price = 1.25
    if fruit == 'orange':
        price = 0.90
    if fruit == 'grapefruit':
        price = 1.60
    if fruit == 'kiwi':
        price = 3.00
    if fruit == 'pineapple':
        price = 5.60
    if fruit == 'grapes':
        price = 4.20


total_amount = price * quantity
print(total_amount)