1. During May, 50,000 units of product were produced. The standard quantity of material allowed per unit was 3 kg at a standard cost of R5.00 per kg. If there was a favourable materials usage variance of R25,000 for May, the actual quantity of materials used must be:

   	A.	165,000 kg.
   	B.	38,750 kg.
   	C.	41,250 kg.
   	D.	145,000 kg.