spendingmoney_daily = float(input())
income_daily = float(input())
expenses = float(input())
gift_price = float(input())
left_money = 0
saved_money = 5*spendingmoney_daily + 5*income_daily
left_money = saved_money - expenses
if left_money >= gift_price:
    print(f"Profit: {left_money:.2f} BGN, the gift has been purchased.")
else:
    diff = abs(gift_price - left_money)
    print(f"Insufficient money: {diff:.2f} BGN.")