Thank you for giving me some time to answer your question.
Since so many factors go into building a deck, I found a get Online Deck Cost Calculator fpr you to use.
Need more information to this answer, just ask and I will be delighted to add more info for you or to answer any additional questions.
Go to the URL that I just gave you and scroll down to about the middle of the page.
Then determine what the size of the deck will be in the example it gives