The quoted section is a commentary on the Westminster Confession of Faith, Chapter 21,paragraphs 7 and 8.

As you are aware, every statement and proposition of the Westminster Confession is footnoted by Scripture proofs.

The entire commentary, in context runs from page 220-225, too long to post here.

The poll question was given in light of the Confessions on this topic.

I'm not sure which Confession you subscribe to by being part of Puritan Board but the London Baptist Confession and Westminster Confession are identical on this point. That means that they are taken to be a faithful summary of the doctrine contained in Scripture.

If you disagree with your Confession, you need to be specific about which statement or proposition you disagree with.

Eating was never prohibited on the Sabbath, and Jesus clarified that necessary food preparation is not a violation of the Sabbath.

Jesus was able to do miracles on the Sabbath because He is Lord of the Sabbath and he was clarifying that we can do works of mercy and not violate the Sabbath.

Neither of these situations were against God's Law, even in the Old Testament, they were the teachings of men (Pharisees) who made up their own regulations.

Neither of these situations have anything to do with ordinarily earning ones's living at a sales job.

You may also find the Westminster Larger Catechism helpful on summarizing the doctrine on this point, questions 115 to 121 and the attending Scripture proofs. These flush out working on the Sabbath and the exceptions for necessity and mercy well.