Can you summarize the story of Cholkar and his vow to Sai Baba?

The story of Cholkar centers on a vow he made to Sai Baba. As a poor man needing to pass an examination to secure his job, Cholkar vowed that if he passed by Baba's grace, he would distribute sugar candy in Shirdi. Chapter 15 recounts that his wish was granted, but financial hardship, described as the difficult "threshold-ghat," delayed his journey. During this time, he personally gave up sugar. When he finally reached Shirdi and fulfilled his vow, Baba demonstrated his omniscience by telling another devotee, Jog, to serve Cholkar tea that was "well-filled with sugar." This specific instruction, as detailed in Chapter 15, amazed Cholkar and confirmed his faith by showing that Baba knew about his secret vow and personal sacrifice.