Group Registration Rates question SOLVED

(Sorry... my question was answered in a previous post) I use this plugin to sell tickets for my sporting events. My prices go down as the more people that register in a group.

Example:
1-4 people 80$ each
5-9 people: 70$ each
10-19 people: 60$ each
20 people and more: 50$ each

Do I have to put a price for every number of persons (image 2)?
Can I just do like in image 3?

Thank-you. If I have to enter 20-30 numbers and amounts it seems to get long.

Brian has the answer for his question. If anyone has the same question, just use the same setup which is mentioned on the file event-booking3.jpg which Brian posted here

Tuan