Ok, call me a retard, but I am working on a new interior for a boat. I cant seem to get my numbers right for the amount of vinyl that I will need. The vinyl comes in a width of 54" x ?? yards. How many yards (or length) of the 54" wide material do I need? Of course I will need extra here and there, but based off these numbers, whats a good guess of amount needed? See the pic below. Thanks.