How to disqualify response that has a low score?

How to disqualify response that has a low score?

I want to make screening questions based on their SES. Typically, to figure out SES, we ask their income, expense, number of people living. All answers are weighted with a score.


EXAMPLE:
Income $100 - $200 scored 2
Expense $100 - $200 scored 2
Number of people living together 3 scored 1
Total Score is 5

SES Table:
SES A = >7
SES B = 6
SES C = 5
SES D = 4

Based on the response, the respondents is in category SES C and since I only want responses from SES A & B. I want this response to be disqualified.

How can I do this?