In their meeting with their advisor, Mr$.$ and Mrs$.$ O'Rourke concluded that they would need $$40,000$ per year during their retirement years in order to live comfortably. They will retire $20$ years from now and expect a $30-$year retirement period. How much should Mr$.$ and Mrs$.$ O'Rourke deposit now in a bank account paying $9$ percent to reach financial happiness during retirement? Assume that once they retire, the O'Rourkes will withdraw $$40,000$ from their retirement account at the end of each year.