new to this and need help "buisness to buisness sales"

I've got to do this by tuesday! i dont know what i'm doing! the title is :‘Why I am interested in a career in business to business sales and why I think I am suitable’ its meant to be 3 mins spoken.

to which i havent a clue really. i want to job becuase its worth more money, which means i can afford to do more fun things with my son. currently i'm a mcdonalds worker, but i know i've more skills than this.
i really need help, asap please! prettttty please

this is a quote from the email thats meant to help me write this presentation
**
Your presentation is an important part of the Interview and Selection day as it is a great opportunity for you to shine and display your presentation skills.

The presentation is designed to show our assessors what you would be like in a sales position. It is an opportunity for you to tell us who you are, why you are different and to really sell yourself.

The duration of the presentation is 3 minutes long and you will only be allowed one minute to set up for your presentation visuals.

Some Pointers:

• Do not drift from the subject. Simply tell us why you are interested in sales and why you would be suited to a sales role. (It’s you and why you’re interested that interests us.)

• Keep within the stated time limits. Ensure your presentation is not too short or too long either!

• Prepare for the presentation. Do not arrive at the assessment day without preparing for it. We have an overhead projector (for transparencies not Power Point) or a flip chart that will be available to use if you wish. All visuals must be prepared before you arrive for the assessment day, including flip chart visuals.

• Practice It. Make sure you are confident enough to talk freely and make plenty of eye contact.

• Do not read your presentation. We want to see the real you – not a prepared speech.

• Relax. We want you to enjoy yourself as much as possible! You’ll only be presenting to 3 to 4 people.

• Be Smart. You are required to attend the day in business dress, keep your suit jackets on! Do not become too relaxed in the way you look.

**

How did it go? I got this interview on thursday. And dont have a clue what to say. What did you do. What worked or didnt. Thanks