What is it that you want to say? 您想说什么？

At a word, the cost is too high. 简而言之，成本太高。 

If you dorfl nnfnd, we'll leave questions to the end. 如果您不介意，我们将把提问放在最后。

If you don't mind, we'll leave questions to the end. 如果您不介意，我们将把提问放在最后。

There's no problem. 没问题。