Dear,
Happy New Year,
I read requirements of your project add shiping costs in orders made by zencart and I am pretty sure that i can pull off your project within the time limit and at the best price too. I have couple of demos for your relevant needs text me on chat so I can show you some creative demos.
About me:
I have been working for couple years as a Sr. Web Developer and Designer of Zen Cart, PHP, OSCommerce, HTML and Prestashop.
Will be waiting for your text
Thanks,
M. Umair