The amount of fidyah for one who is permanently unable to fast

Question:
May Allah reward you with good and do you good. After this, a message from one of the sisters who preferred not to mention her name. She asks a collection of questions, one of which is: Is it permissible for me to fast on behalf of my mother for what she missed in Ramadan due to a valid religious excuse? Because fasting is somewhat difficult for her, but not due to illness or a valid religious excuse. And if it is not permissible, is it permissible for her to give the fidyah of feeding a poor person for each day? May Allah reward you with good.

Answer:
If your mother is unable to fast due to her advanced age and old age, it is obligatory for her to offer the expiation for each day, which is feeding a poor person. Allah, Glorified and Exalted is He, said: The meaning of this is the one who is unable to fast due to a permanent incapacity, whether from old age and frailty, or from a chronic illness from which recovery is not expected. In their case, the expiation takes the place of fasting. The expiation is feeding a poor person for each day with a quantity of half a sa' (a dry measure of about 3 kg), which is approximately one and a half kilograms for each day. Yes.