The section of Sweet Wave that produces pies for the company provided the following information.

February Sales: 4,000

Variable manufacturing cost per unit: $9.75

Sales price per unit: $42.50

Fixed manufacturing overhead cost: $81,000

Variable selling and administrative expenses per unit: $3.00

Fixed selling and administrative expenses (per month for pies): $13,122. Calculate the contribution margin ratio

(use decimal with two numbers after the decimal)