What is the prescribed compensation for the wet nurse if the contracting party (the one hiring the nurse) is affluent?

Primary text

If the hiring party is affluent, the prescribed compensation for nursing is the freeing of a slave (male or female), as indicated by the Hadith narrated by Abu Dawud, deemed Hasan Sahih by Al-Tirmidhi, where the Prophet (PBUH) stated, 'What absolves me from the responsibility (dhimmah) of nursing is a slave (ghurrah), male or female.' The rationale for specifying the neck (the slave) as compensation is that the wet nurse's action in nursing and custody is the cause of the child's life and preservation. Thus, the recompense should relate to the preservation of life, similar to how God made the wet nurse a mother (Quran 4:23).