What is the external conflict for the story "The Gift Of The Magi" by O. Henry?

"The Gift of the Magi" is a wonderful story about
unconditional love. The external conflict facing Jim and Della in the story is their
poverty, their need for money. It is Christmastime, and each wants to give a special
gift to the other. However, they are very poor and don't have the money to buy the gifts
that they want to give. So in order to earn the money they need, each makes a sacrifice,
only to discover that they can't use the gifts because of the sacrifices they each
made.