Hello, I have read task very carefully. I can do it very easily. I am 10+ years experienced in PHP, MYSQL, osCommerce, creLoaded, Loaded Commerce, WordPress, Magento, Smarty etc. I can fix error message in UPS shipping while recipient's address is in the USA and also can update code easily for shipping cost discount accordingly task given. Still I have question accordingly understand task. Please make me more clear about task. I consider it 3 potions for shipping cost reduction.
1. Option to setting up % for ranges of order total to reduce shipping cost. like
order total range %
>100€ 15%
>250€ 10%
>400€ 8%
etc. maximum shipping cost reduce to 0€
2. Or option to setting up amount for ranges of order total to reduce shipping cost. like
order total range amt.
>100€ 15€
>250€ 25€
>400€ 30€
etc. maximum shipping cost reduce to 0€
3. Option to enable/disable shipping reduction for each product. If setting enabled to product and included in order, reduction will apply otherwise not.