How did Yaakov and his family survive “when they finished eating the grain that they had brought from Egypt”.

Question

It says in Beraishis 43(2), “…when they finished eating the grain that they had brought from Egypt, that their father said to them, "Go back [and] buy us a little food."”

What were they to eat until the delegation had gone down to and returned from Egypt?

Is it possible that they were to survive on some of the edible products of which they were taking a small quantity down to Egypt as a gift, (Beraishis 43(11)) “a little honey, (wax and lotus), pistachios and almonds.”?

Answer 1

The Ohr Hachaim answers that either this means that there was just enough left for a return trip to Egypt which is considered "finished" because they needed more, or alternatively what they brought from the previous trip to Egypt was finished but they still had some food that Yaakov saved for times of famine.