Based on past experience, a production process requires 15 hours of direct labour and 2 assemblers for every $450 of raw materials. If the company has budgeted for $33,750 worth of raw materials, how many hours of direct labour and how many assemblers will the company require?
A) 112.5; 15
B) 2,250; 300
C) 1,125; 150
D) 112.5; 150
E) 1,125; 300