Charity campaing - EX

charity_days = int(input())
sweeters_cnt = int(input())
cakes_cnt = int(input())
waffles_cnt = int(input())
pancakes_cnt = int(input())

cakes = cakes_cnt * 45
waffles = waffles_cnt * 5.80
pancakes = pancakes_cnt * 3.20

sum_per_day = (cakes + waffles + pancakes) * sweeters_cnt
sum_of_campany = sum_per_day * charity_days
sum_after_all = sum_of_campany- (sum_of_campany/8)
print(sum_after_all)