A trucking company wants to transport cases of cat food and/or cases of dog food. Each case of cat food weighs 60 pounds, has a volume of 2 cubic feet, and sells to the retail pet store for $100. Each case of dog food weighs 40 pounds, has a volume of 3 cubic feet, and sells for $60. Each truck has no more than 600 cubic feet of volume for the pet food. The trucking company insists that each truckload generate at least $18,300 in pet-food sales. How many cases of each kind of pet food should be loaded onto each truck to minimize the weight of pet food, and what is the minimized weight?