Accounting problem, does anyone know the answer?

Presto Company makes radios that sell for $26 each. For the coming year, management expects fixed costs to total $200, 830 and variable costs to be $16.90 per unit, Compute the break-even point in dollars using the contribution margin (CM) ratio. Compute the margin of safety ratio assuming actual sales are $789, 271. (Round margin of safety ratio to 2 decimal places, e.g. 10.50%.) Margin of safety Compute the sales dollars required to earn net income of $88, 550