What was the specific vow Cholkar made to Sai Baba, and how did Baba show him that it was accepted?

Cholkar's vow was made out of desperation to secure his job by passing an examination. As recounted in Chapter 15, he made a 'firm resolve' that if he passed by Sai Baba's grace, he would go to Shirdi and distribute sugar candy in Baba's name. A significant part of this vow was his personal sacrifice: until he could fulfill the offering in Shirdi, Cholkar completely gave up sugar, even drinking his tea without it. The acceptance of this vow was shown in a miraculous way. After Cholkar finally arrived in Shirdi and completed his offering, he was visiting with another devotee named Jog. At that moment, Baba, who did not drink tea, specifically instructed Jog to give Cholkar 'cups of tea, well-filled with sugar.' This startlingly specific command was Baba's way of showing Cholkar that his secret vow and the long period of renunciation were known and accepted, confirming his faith profoundly.