What was the other sentence that socrates proposed besides free meals?

Answer 1

Other than free meals at the Prytaneum, he proposed this (link 1):

"Had I money I might have proposed to give you what I had, and have been none the worse. But you see that I have none, and can only ask you to proportion the fine to my means. However, I think that I could afford a minae, and therefore I propose that penalty; Plato, Crito, Critobulus, and Apollodorus, my friends here, bid me say thirty minae, and they will be the sureties. Well then, say thirty minae, let that be the penalty; for that they will be ample security to you."

Thirty minae, in other words. According to Xenophon, even one mina would about to about a fifth of Socrates' wealth, which would translate to about $1500 these days (link 2).

Answer 2

Sex is the answer to everything...