Add Bags

price_over_20_kg = float(input())
bag_weight = float(input())
day_before = int(input())
bag_count = int(input())

if bag_weight < 10:
    price_over_20_kg /= 5
elif bag_weight <= 20:
    price_over_20_kg /= 2

if day_before < 7:
    price_over_20_kg *= 1.4
elif day_before <= 30:
    price_over_20_kg *= 1.15
elif day_before > 30:
    price_over_20_kg *= 1.1

total = price_over_20_kg * bag_count

print(f' The total price of bags is: {total:.2f} lv. ')