Final answer:
Kramer could include a limitation of liability clause in the contract with Jerry to protect him from damages caused by the barbeque.
Step-by-step explanation:
To help protect Kramer from damages, he could include a limitation of liability clause in the contract with Jerry. This clause would state that Kramer is not responsible for any damages caused by the barbeque, including the loss of food and any resulting inconveniences. By including this clause, Kramer would limit his liability to only the cost of refurbishing the barbeque, which in this case is $500.