You Can Depend on Me

 is a quest in Fallout: New Vegas.

Quick walkthrough
It is given by Alice McLafferty at the Crimson Caravan camp. She tells you to deliver an invoice to Hildern at Camp McCarran. After which you are given three tasks to complete.

Detailed walkthrough
1. Simply deliver a parcel to Dr. Hildern. He can be found in Camp McCarren inside the airport on the first floor.

2. You need to buy out Rose of Sharon Cassidy's contract. There are a variety of skill checks that can be used such as barter and speech available to complete this. Once you do this she will sell her company, and in addition she will be available as a human companion.

3. You need to convince Jamison to quit his job. He can be found at the Atomic Wrangler Casino at a slot machine. He will quit his job without any checks but this will cause you to get only 300 caps from this mission, if you manage to make him quit using a speech check(over 50) you will earn 500 caps.

4. (Optional) To acquire the Gun Runner's secret manufacturing specifications grab a Stealth boy and head the entrance of the Gun Runner's factory. Activate the Stealth boy and pick the lock at the gate, you will lose karma for doing this. Make sure are crouched and hidden. Head to the front door then all the way to the back of the building. Grab the information off the computer to the right of the room and head back out again. Make sure you are still crouching or else the guards will see you and attack. While crouched, if there are weapons on the workbenches, you can take them and the guards will not notice. Alternately, There is a shift change sometime between 10pm and 11pm (while the gun smiths are conveniently asleep) during which the player can follow a guard through the locked gate. The guard will leave the door unattended briefly to patrol the compound. By moving quickly quickly the building can be entered, the data retrieved and the compound exited before the guard returns to his post.

Bugs

 * If you have completed "There Stands the Grass" quest, Doctor Hildern might glitch and not accept your parcel.