Multiple Product Break-Even Analysis last year, the fixed cost of rent, utilities, and so forth were $70,000. Required (a.) Determine Joe's break-even dollar sales volume. - Enter billing rates and contribution margins using all decimals, when needed. - Round contribution margin ratio to three decimal places. - Round break-even sales volume to the nearest dollar. (b.) Determine Joe's margin of safety in sales dollars. Hint: Use weighted average billing rate. Round answer to the nearest whole number. $