A lоgistics cоmpаny is respоnsible for shipping products from а wаrehouse to five different stores located in different cities. The company has three trucks available with varying weight and volume capacities, and the orders placed by the five different stores all have different weights and volumes. On each truck trip, the truck loads up at the warehouse and then delivers product to at least one of the stores. On a single trip, the truck can deliver product to more than one store before returning to the warehouse to load up another shipment. The costs of traveling from site i to site j are given by the following equation: