I don't get the right answer....

43. Sleep Well produces two types of pillows, a standard and a premium version. Sales price for the standard version is 10 with variable costs of 6 per unit. The premium pillow sells for 30 with variable costs of 15 per unit. The standard version requires one machine hour, while the premium version requires three machine hours. Total xed costs are 20 000 and the yearly machine hour capacity is 30 000 hours. Assuming that there are no selling constraints, what is the optimal product mix? A) 0 standard pillows and 30,000 premium pillows B) 0 standard pillows and 10 000 premium pillows C) 30,000 standard pillows and 0 premium pillows D) 15,000 standard pillows and 15,000 premium pillows