My PC$,$ a mail order computer company, sells two kinds of computers, desktop andlaptop, on line. Their supplier can supply no more than $120$ desktops and $80$ laptops permonth. Once received from the suppliers each computer goes to the software departmentfor installation of standard software $($like Windows and MS Office$).$ Each desktop takes $1$hours and a laptop takes $2$ hours for installation. After software installation eachcomputer goes to the shipping department for dispatch. Each computer $($whether adesktop or a laptop$)$ takes $30$ minutes of time in the shipping department. The cumpanywill have no more than $200$ hours available in the installation and $75$ hours available inthe shipping department. The company has enough demand for both kinds of computersso that they can sell as much as they want to$.$ My PC earns a net profit of $$300$ on adesktop and $$250$ on a laptop.