How much does it cost to open a grave for ashes, my mother and father are there is it possible to put in ashes?

I believe you should contact them and asks about this, to open and bury my mom was 2000

Thank you for your answer, my concern was could my son s ashes be buried with my mother,but I never got a straight answer and now I am beginning to wonder if I made a right choice about a burial site for my family ,after being treated the way I was,maybe they need some sales personal who know what they are doing