Onderdonk entered a retirement home operated by Presbyterian Homes. The contract between Onderdonk and the home required Onderdonk to make a specified monthly payment that could be increased by the home as the cost of operations increased. The contract and the payment plan were thoroughly explained to Onderdonk. As the cost of operations rose, the home continually raised the monthly payments to cover these costs. Onderdonk objected to the increases on the ground that the increases were far more than had been anticipated and that the contract was therefore unconscionable. Was his objection valid?