Magento upgrade from to the latest version

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have a magento ecommerce site v and wanted to upgrade this to,
It should not interrupt the current site so we may setup a subdirectory to put up the updated version and once everything works fine, move that to the main root.

Skills required:
Magento, MySQL, PHP
About the employer:
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$ 250
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