Describe Sai Baba's specific advice regarding Damu Anna's business plan and how Damu Anna reacted upon receiving the reply.

After Shama read Damu Anna's letter aloud, Sai Baba declared that the 'Shet's mind has gone astray.' According to Chapter 25, Baba instructed Shama to send a reply with a clear message of contentment over ambition. The advice was, 'what do you lack at home? Half a loaf of bread is enough for us; do not fall into the trap of millions.' Upon receiving this reply, Damu Anna was profoundly disappointed. The source describes how the 'fortress of his desires crumbled' and the 'tree of hope was uprooted.' He lamented the lost opportunity to earn a lakh and become a millionaire, feeling crestfallen that his plans had melted away because of Baba's counsel.