What happens at the end of the story cold equations?

In the story "Cold Equations" by Tom Godwin, the stowaway Marilyn accidentally sacrifices herself to save the larger mission when her added weight to the spaceship causes a shortage of fuel. The Captain is forced to eject her into space to prevent the ship from crashing and ensure that the vaccine delivery to the distant colony can be successful. It's a tragic ending that highlights the harsh realities of space travel and the sacrifices that must sometimes be made.