Pastryworks Company manufactures two productstoaster ovens and bread machines. The following data are available: Toaster Ovens Bread Machines Sales price 580 $150 Variable costs $20 $50 Pastryworks can manufacture six toaster ovens per machine hour and four bread machines per machine hour. Pastryworks' production capacity is 2,000 machine hours per month. What is the contribution margin per machine hour for toaster ovens? (Round machine hour per unit to two decimal places and your final answer to the nearest whole dollar.) O A. $20 OB. $13 O C. $360 OD. $400