please answer within 10 minutes thank you

Philips Sonicare Toothbrush is sold for $22 per unit. Variable manufacturing cost is $8.58 per unit plus a 8% sales commission. Total fixed costs are $157,410 per month. Three requirements: a. Compute the contribution margin ratio. b. Compute the break-even sales revenue in the dollar amount. c. What sales revenue is needed to achieve a $112,890 per month profit? a. Compute the contribution margin ratio. Contribution Margin % b. Compute the break-even sales revenue in the dollar amount. Break-Even Sales Revenue c. What sales revenue is needed to achieve a $112,890 per month profit? Total Sales Revenue Needed