1)
Why did he mention that they have fodder for the donkeys?
1.
Malbim: Do not think that you will need to feed our animals.
2)
Why did he say "Li vela'Amasecha vela'Na'ar Im Avadecha"?
1.
Radak: There is much food and wine for the woman and my youth, and also for your slaves in your house, if they want to eat from what we have with us. 1
2.
Radak citing Targum Yonasan: The youth is with Avadecha, i.e. me and my Pilegesh. This is correct.
3.
Malbim: I have more than we need; my youth will eat with your slaves from what I will give to him.
3)
Why does it add "Ein Machsor Kol Davar"?
1.
Malbim: Even other matters such as spices [we have; you need not give anything].
