The following information is given for Egele Kamp. Inc Unit sales price $ 10 Variabe cost per unit 6 Total fixed costs 50,000 Determine the following : (a) Contribution margin per unit (b) Contribution margin ratio (c) Break even sales in units (d) Break even sales in dollars (e) Sales in units required to achieve a net income of $ 4,000 (f) Sales in units required to achieve a net income of 15 percent of sales.