前几天去td问了mortgage，然后今天收到这个回信。这个300元费用是怎么回事，有人知道吗？

I have this mortgage approved pending an appraisal. I do not recommend that you waive your conditions of financing until the appraisal is done. The appraisal costs $300 dollars please let me know as soon as possible if you would like me to order this.