The main ingredient in acertain prescription drug capsule costs $500.00 per kilogram. If each capsule contains 600 milligrams of the ingredient,   what is the cost of the ingredient in a capsule? (1 kilogram =106 milligrams) 
$0.30  
$0.83  
$1.20  
$3.00  
$3.33  
错因:题目意思没搞懂
600m=0.0006k 500*0.0006=0.3