Answer: In “A Worn Path” by Eudora Welty, the unexpected benefit, or boon, that Phoenix received is "ten cents". She received 10 cents as a boon, however she will use the money to buy a paper mill for her grandson.
Phoenix Jackson, when described, is a black woman, old and small, eyes are old and wrinkled. She is carrying with her a cane, wearing an untied pair of shoes, dressed in a black striped dress, and an apron which is bleached sugar. Phoenix tied a red rag around her head.
In the story, she is going to the medical clinic to get some medicine for her grandson who swallowed a lye.