A Computer Retail Store Sells Two Types of Flat Screen

A computer retail store sells two types of flat screen monitors: 17 inches and 19 inches,with a profit contribution of $300 and $250,respectively.The monitors are ordered each week from an outside supplier.As an added feature,the retail store installs on each monitor a privacy filter that narrows the viewing angle so that only persons sitting directly in front of the monitor are able to see on-screen data.Each 19" monitor consumes about 30 minutes of installation time,while each 17" monitor requires about 10 minutes of installation time.The retail store has approximately 40 hours of labor time available each week.The total combined demand for both monitors is at least 40 monitors each week.How many units of each monitor should the retail store order each week to maximize its weekly profits and meet its weekly demand?