Biopsy cost between PGS and PGD

Kelly
Do you think there is difference in biopsy cost between PGS and PGD? I was looking at my bill and noticed I was being charged $2100 for PGD biopsy, but I only did PGS. I thought biopsy cost was around $1800.
I know I should ask clinic but I have been bothering them ever since I'm done retreival.
(By asking too many questions)