Charges made by a cemetery authority for foundations, for setting of or permitting the setting of, or for endowment care of, grave markers or monuments, shall be uniform whether the marker or monument sale was made by the cemetery authority or by another person, firm, or corporation. The amount charged for the marker or monument, the foundation, the setting, permitting the setting and the deposit for endowment care, shall be separately stated, in the contract of sale, when applicable.