Beraisa - R. Yehuda: He also does not need to give the three extra drops just before Shabbos - since he is busy preparing for Shabbos, the Chachamim did not make this obligation on him.

Chachamim: He must even give the drops just before Shabbos.

Question: Why did the Mishnah teach that if there was a middleman and it broke, that he suffers the loss?

R. Yudan: The middleman is like a day worker, who is liable unless it was beyond his control (known as an ones).