说明：  生产最优化问题 某公司生产5种产品P1, P2, P3,P4,P5，其单价分别为550, 600, 350, 400, 200。生产过程有三道工序:研磨、钻孔、装配。其所需工时分别为： P1 P2 P3 P4 P5 I 12 20 0 25 15 II 10 8 16 0 0 III 20 20 20 20 20 各工序的生产能力（工时数）分别为288 192 384。
(Production optimization problem of a company producing five kinds of products P1, P2, P3, P4, P5, which are priced at 550, 600, 350, 400, 200. Production process has three steps: grinding, drilling, assembly. Their required hours of work were: P1 P2 P3 P4 P5 I 12 20 0 25 15 II 10 8 16 0 0 III 20 20 20 20 20 Production capacity of each process (hours worked) was 288,192,384.)