#1 решение

import math

budget = float(input())
students = int(input())
flour_price = float(input())
egg_price = float(input())
apron_price = float(input())


flour_discount = 0
total_flour_price = students * flour_price
total_egg_price = egg_price * 10 * students
total_aprons_price = apron_price * (math.ceil(students * 1.2))

for student in range(1, students + 1):

    if student % 5 == 0:
        flour_discount += flour_price

total_price = (total_flour_price - flour_discount) + total_egg_price + total_aprons_price

if total_price <= budget:
    print(f"Items purchased for {total_price:.2f}$.")
else:
    print(f"{abs(budget - total_price):.2f}$ more needed.")