Can you summarize the story of Cholkar from the provided text?

The story of Cholkar, as detailed in Chapter 15, is one of faith and divine omniscience. Cholkar, a man from a poor household, vowed to distribute sugar candy in Sai Baba's name if he passed a crucial exam for his job. His wish was granted, but financial hardship, described as a difficult 'threshold-ghat' of home expenses, delayed his pilgrimage to Shirdi. During this time, Cholkar gave up sugar himself. When he finally reached Shirdi and fulfilled his vow, Baba demonstrated His awareness of the secret sacrifice by telling a host to give Cholkar 'cups of tea, well-filled with sugar.' This act confirmed Cholkar's faith and served as a lesson that Baba is aware of all a devotee's actions and thoughts.