Highlander technologies makes three types of smart phones: the hipi, the hipii, and the oldgeezer. each smart phone requires some labor, in the fabrication department, in the assembly department, and in the shipping department. the smart phones are sold through a local dealer who has estimated the maximum demand for the coming quarter for the hipi, the hipii, and the oldgeezer of 300, 250, and 100 units respectively. the dealer makes profit of, $15, $24, and $18 for the hipi, the hipii, and the oldgeezer respectively. the fabrication department has a maximum of 1850 hours for the quarter. the assembly department has a maximum of 2400 hours for the quarter. the shipping department has a maximum of 1500 hours for the quarter. the hipi model requires 4 hours, 3 hours, and 3 hours for fabrication, assembly, and shipping respectively. the hipii model requires 6 hours, 5 hours, and 2 hours for fabrication, assembly, and shipping respectively. the oldgeezer requires 2 hours, 7 hours, and 4 hours for fabrication, assembly, and shipping respectively. the goal is to maximize profit with the best product mix. work-in-progress is ok.