The following persons shall be liable for the reasonable costs of any goods or services purchased in connection with the exercise of the right of disposition for a declarant or deceased person:
(A) A representative or successor who assumes liability for the cost of such goods and services by signing a written declaration that states that such an assumption is made;
(B) A person to whom the right of disposition is assigned pursuant to section 2108.81 of the Revised Code and who has purchased goods or services associated with an exercise of the right.