What was the specific vow Cholkar made to Sai Baba and why did he feel the need to make it?

Cholkar came from a poor household where everything depended on his job. In order to make his salary permanent, he needed to pass an examination. As described in Chapter 15, his entire livelihood was at stake. Facing this challenge, he made a firm vow to Sai Baba that if he passed the exam by Baba's grace, he would present himself in Shirdi and distribute sugar candy (khadisakhar) in Baba's name. This vow was a heartfelt plea for divine assistance to secure his future and avoid losing his daily bread.