A company is trying to decide whether to buy a new delivery truck to replace their old one. The old truck originally cost $32,000. The new truck will cost $45,000. If they buy the new truck, they will sell the old truck to a used truck dealer for $4,000. Based on the information given, what is the immediate total incremental cost or benefit of buying the new truck? (Indicate a net benefit as a positive number and a net cost as a negative number.)