PC$-$Express is a computer retail store that sells desktops and laptops. The company earns $$600$ on each desktop computer it sells and $$900$ on each laptop. The computers PCExpress sells are actually manufactured by another company. This manufacturer has a special order to fill for another customer and cannot ship more than $80$ desktops and $75$ laptops to PC$-$Express next month. The employees at PC$-$Express must spend about $2$ hours installing software and checking each desktop computer the company sells. They spend roughly $3$ hours to complete this process for laptop computers. PC$-$Express expects to have about $300$ hours available for this purpose during the next month. The store's management is fairly certain that they can sell all the computers they order but are unsure how many desktops and laptops they should order to maximize profits.