'Need payoff' questions are demonstrated as the questions that are asked during the sales process and intend to ask regarding the needs or requirements of the consumers and how a particular solution is valuable or significant for them instead of imposing a solution to them(which may or may not be helpful to them).
As per the question, the given questions asked by the salesperson during the 'SPIN technique' exemplify the 'need payoff' question as the salesperson aim to test the validity of solutions for the consumers when he asks 'If I can show you how to cut melamine, high-pressure laminates, and fine veneer without any chips or breaks, would that save you any money'. It would helps his company to better focus on the needs of the customers instead of imposing them with their own solutions.
The question produces a variable that is binomial, because it only allows two answers or categories:
"<em>Yes" or "No"</em>
If it were a quantitative question, it would allow the respondent to give an answer that generates a numerical/quantitative variable, for example, <em>how old are you?</em>
