Question 422301
cost-------------------- quantity
8.75	----------------	x
3.75	----------------	100-x
6.35	----------------	100

...
8.75x+3.75(100-x)=6.35*	100
8.75x+375-3.75x=	635		
8.75x-3.75x=635-375		
5x=260							
/5									
x=52	pounds  of $8.75		
48 pounds of $3.75%