PayPal API: The totals of the cart item amounts do not match order amounts

Question

There are a lot of posts about this error, but they all not apply on me. I really don\'t understand why the amounts wouldn\'t match. I have ITEMAMT which matches AMT0 * QTY0

Answer 1

It is mandatory that you send currency with 2 decimal places. It appears that you are only providing 1.

$amt = 61.9;
$amt = sprintf("%.2f",$amt); // 61.90

Paypal will return this error because the amount is not in the correct format:

Take a look at Table A.2 under the AMT row:

http://www.paypalobjects.com/en_US/ebook/PP_NVPAPI_DeveloperGuide/Appx_fieldreference.html

This rule should apply every time you set a 'money' parameter.