$123,456 · Looking for a deck repair

Have a 13 foot beam under a deck that has rotted at one end It is supported by two 6X6 columns Needs to be replaced Width is 4 1/2" Height is 9 1/4" If I were to get the beam delivered to my house and size it up How much to install it You will need to support the deck to remove the old one You will need to be insured and come with your own equipment