Problem $2$: Shipping Pet Fish. GloFish, Inc., has genetically engineered a species of fish that glows in normal lighting conditions. The company believes the glowing fish will be a huge success as a new pet option for children and adults alike. GloFish, Inc., has developed two varieties of its glowing fish: one that glows red and one that glows blue. GloFish currently "grows" its fish at two different fish farms in the United States: one in Michigan and one in Texas. The Michigan farm can produce up to $1$ million red and $1$ million blue GloFish per year; the Texas farm can produce up to $600000$ GloFish, but only in the blue variety. GloFish ships its fish between the fish farms and its three retail stores using a third$-$party shipper. The shipment rates between origins and destinations are shown in the following table. These costs are per fish and do not depend on the color of the fish being shipped.