Home Warranty Question - Seller is paying

[Ryan Lee]

Hi,

In the home purchase contract we have(I'm in Nevada), it's indicated that seller will pay for home warranty and cover coverage of $600.

1. What happens if I buy a coverage for like $500. Will they pay $500, and $100 will be paid to me at escrow? Or is this $100 gone?
2. What happens if I don't purchase it. Can I get cash via escrow(they pay advance) and buy coverage later on with $600?

Thanks