We're not sure of whether or not they reach you before December 15 because the stock 1 Dec, but the boat schedule: December 8, which is a factor that we think cannot be done on to you within 15 Dec certainly.
We are confident that you will arrive before December 15 or December 1 because of stock but are scheduled to ship December 8, which is a factor we can not control. I think that would be to the 15 of December, of course.
We are not sure of the will to you before 15 December? Because shipping 1 December, but determined to sail is 8 December. Which are the factors we cannot control. Think the goods will not you within 15 December.