Computer solution First, let's formulate our problem and set it up as a \"regular\" LP problem that we will solve using the LP software LINDCH' The XYZ Sawmill Company 's CEO asks to see next month's log hauling schedule to his three sawmills. He wants to make sure he keeps a steady, adequate flow of logs to his sawmills to capitalize on the good lumber market. Secondary, but still important to him, is to minimize the cost of transportation. The harvesting group plans to move to three new logging sites. The distance from each site to each sawmill is in Table 1.The average haul cost is $2 per mile for both loaded and empty trucks. The logging supervisor estimated the number of truckloads of logs coming off each harvest site daily. The number of truckloads varies because terrain and cutting patterns are unique for each site. Finally, the sawmill managers have estimated the truckloads of logs their mills need each day. All these estimates are in Table 1. Table I.Supply and demand of sawlogs for the XYZ Sawmill Company. Logging Distance to mill (miles) Maximum ti'uckloadslda}r site Mill A Mill B Mill C per logging site 1 S 15 5t} 2t] 2 III} 1'." 2t} 30 3 30 2o 15 45 Mill demand (truckloadstday) 3t} 35 3'3 Table 2.Round-trip transportation costs for XYZ Sawmill Company. Logging site Mill A Mill B Mill C 1 $ 32* $ 60 $200 2 40 63 80 3 120 104 60