What did Della want to buy for her husband for Christmas and how much money did she have to start with?

In the story "The Gift of the Magi"  Della wanted to
purchase a watch bob for her husband Jim.  Della thought that Jim looked very nice and
prominent with his watch and wanted him to have a nice platinum fob chain.  Della only
has a dollar and eighty-seven cents.

Della has a possession
hat she loves very much.  It is her lovely hair.  To get money she knows that she will
have to sell her pride and joy, hair.  Della wants to give her husband the gift more
than her own vanity so she goes to a woman and sells her
hair.

Della the takes her money and goes to the jewelers. 
The man does not think that she has the money for the fob at first, but she is able to
buy it for her husband and can hardly ait to surprise him.