Final answer:
The purpose of this infomercial is to persuade the audience to buy the Dairy McGrab, by showcasing its benefits and addressing dairy food problems.
Step-by-step explanation:
The purpose of this infomercial is to persuade the audience to buy the Dairy McGrab. It aims to convince viewers that the product will solve their dairy food problems. The infomercial likely uses persuasive language and demonstrations to showcase the benefits of the Dairy McGrab and encourage viewers to make a purchase.