montana wood products manufactures tow highly quality products?

This question comes from Operations management textbook on formulating LP problems.
Montana wood products manufactures two high quality products, chairs and bookshelf units. Its profit is per chair and per bookshelf unit. Next week’s production will be constrained by two limited resources, labor and wood. The labor available next week is expected to be 920 labor hours, and the amount of wood available is expected to be 2400 board feet. Each chair requires 4 labor hours and 8 board feet of wood. Each bookshelf unit requires 3 labor hours and 12feet of wood. Management would like to produce at least 100 units of each product. a.) To maximize total profit, how many chairs and bookshelf units should be produced next week? b.) How much profit will result?