Inequalities: (Problem Solving). Can anyone help me to solve this problem..please help. Thank you in advance..?

The Blue Company manufactures two types of electric n shavers, one shaver is cordless requires 4hours to make and sells for $40. The other shaver is a cord type takes 2hours to make and sells for $30. The company has only 800 work hours to use in manufacturing each day and the shipping department can pack and ship only 300 shavers per day. How many of these type of shaver should the Blue Company produce per day to maximize its sales revenue?