Matzo, Inc. sells a product with a contribution margin of $30 per unit. Fixed costs are $3,900 per month. How many units must Matzo sell to break even? Begin by showing the formula and then entering the amounts to calculate the units Matzo must sell to break even. (Abbreviation used: CM = contribution margin. Complete all input fields. Enter a "0" for items with a zero value.) = Required sales in units