However if one does not have the ability to perform any of these...
However if one does not have the ability to perform any of these, then one must give some amount of food to a poor person, and if one can not even perform this, then one must do as much as possible and also give Sadaqah. If one is not even able to do this, then one must ask for forgiveness from Allah (SWT).
The Rules of the Qada’ and the Kaffarah of the Fast Issue 371: It is not necessary that the Qada’ of the fast be performed immediately, but according to Ihtiyat Wajib, it must not be delayed until the next Ramadan. Issue 372: One must not be negligent about giving the Kaffarah, but it is not necessary that the Kaffarah be given immediately, and even if a few years pass before it is fulfilled, nothing has to be added to the Kaffarah.
Issue 373: If someone does not fast due to an excuse such as travelling, and after the month of Ramadan the excuse goes away, and until the next Ramadan intentionally does not make up the Qada’ fast, then in addition to making up the Qada’ fast, one must also give one Mudd of food to a poor person for each fast that was missed.
Even if due to an excuse, the Qada’ fast was not made up, then according to Ihtiyat Wajib, in addition to performing the Qada’ fast, one must also give one Mudd of food to a poor person. Issue 374: If someone is not able to fast due to sickness and this sickness continues until the next Ramadan, then the person is not responsible for making up the Qada’ of the fast, however one must give one Mudd of food to a poor person for every fast that was missed.
The Fast of a Traveller Issue 375: The traveller who must reduce his Salat from four Rak’at to two Rak’at during a journey, is not allowed to fast while he is travelling, but he must perform the Qada’ of the fast. As for the traveller whose Salat is prayed in full, he must fast while he is travelling - for example the person whose profession is travelling. Issue 376: A person who is fasting and travels after ²uhr must continue with his fast, and it will be valid.
Issue 377: If a person who is fasting travels before ²uhr, and reaches the Hadd Tarakkhus - meaning he reaches the point where he can not hear the Adhan of his city and he can not see the people of his city - then his fast will become invalid. If before he reaches this point, he does something to make his fast void, then along with performing the Qada’ of the fast, a Kaffarah also becomes Wajib upon him.