فَصَاحِبُهَا بِالْخِيَارِ: إِنْ شَاءَ أَعْطَى مِنْ كُلِّ فَرَسٍ دِينَارًا
Translation: The owner has a choice: if he wishes, he gives one dinar for each horse.
The word choice concerns two permitted methods of discharge under this position. This first method counts horses and assigns one dinar to each qualifying animal.