please show work so i can understand. thank you.

5) A pencil manufacturer had the following information: Plastic tubes: top and tip .12 per unit Ink .02 per unit Direct Labor .02 per unit Selling Price .40 per unit Advertising $80,000 Salaries $200,000 Factory Overhead $120,000 Total pencil market is 10,000,000 pencils. Calculate: I A. unit contribution B. break even volume in units C. Total profit if 3,000,000 pencils are sold D. Volume in units to generate $500,000 in profit