Sales and Leases of Goods(business law)

I need help with a Business Law question. All explanations and answers will be used to help me learn.

John Doe contracted with Bobby Rant, a common carrier, to transport 1020 hives of live bees along with associated equipment from San Francisco, California, to Chicago, Illinois. At 8:00 a.m. on June 3, 2006, while en route, Bobby Rant’s truck skidded off the road and tipped over, severely damaging the cargo. Bobby Rant notified John Doe what had happened, and John Doe immediately set out for the scene of the accident. He arrived at 7:00 p.m. with two bee experts and a Bobcat loader. The turned-over truck on top of the cargo hindered them, and they determined that they could not safely salvage the cargo that evening. The next day, an insurance adjuster determined that the cargo was a total loss. The adjuster directed a bee expert, Dr. Hollow, to conduct the cleanup; Dr. Hollow was allowed to keep the salvageable cargo, valued at $10,516, as compensation. John Doe sued Bobby Rant for damages. Bobby Rant denied liability and further contended that John Doe failed to mitigate damages. Decide.