Magento shipping method

Avg Bid (USD)
Project Budget (USD)
$10 - $30

Project Description:
we need to add to a magento shop extendes shipping methods:
- 3 categories of countries.
- For each category a first price + additional price for each more product aded to cart

give me your suggestion per pm if you use extention or you make it by custom coding.

Skills required:
HTML, PHP, Website Design
About the employer:
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