số lượng

giá

tổng giá

1

$0.1200

$0.1200

10

$0.1000

$1.0000

50

$0.0900

$4.5000

100

$0.0800

$8.0000

500

$0.0750

$37.5000

1000

$0.0650

$65.0000

3000

$0.0600

$180.0000

6000

$0.0600

$360.0000

15000

$0.0550

$825.0000