Four years ago material X cost $5 per kg and the price index most appropriate to the cost of material X stood at 150.The same index now stands at 430.What is the best estimate of the current cost of material X per kg?
A、$1.74
B、$9.33
C、$14.33
D、$21.50
A、$1.74
B、$9.33
C、$14.33
D、$21.50
【参考答案及解析】
$14.33 ($5 x 430 - 150)
$14.33 ($5 x 430 - 150)