using LINGO

9-2. Five items are to be loaded in a vessel. The weight w;, volume v;, and value r; for item i are tabulated below. Item i Unit weight, w; (tons) 5 Unit volume, v, (yd) Unit worth, ($100) 1 2 1 8 4 7 6 5 4 2 7 The maximum allowable cargo weight and volume are 210 tons and 198 yd, respec- tively. Formulate the ILP model, and find the most valuable cargo