does opencart have the kind shipping module?...

i need a shipping module like this:
(a bag's shipping cost is $5)
i buy one bag is $5
if i buy three bags are $10...

so here's what i want:
1~2 is $5
3~5 is $10 and so on...

how do i make it?
does opencart have the kind shipping module? thanks

Do you need category based shipping?
If yes, opencart haven't feature like that. But, you can use third party extension.
Opencart Addons and Jonathan (Clear Thinking) is good developer for shipping. You can check link below:
http://www.opencart.com/index.php?route ... 20Thinking
http://www.opencart.com/index.php?route ... t%20Addons

i google a module called "occ shipping"
that's what i need! but the download link seems doesn't work
anyone could share? please