Paypal API：购物车项目金额的总数与订单金额不匹配 - ＆gt; 10413

Question

我的逻辑是L_PAYMENTREQUEST_0_QTY0是产品的数量，然后L_PAYMENTREQUEST_0_AMT0是单数产品的价值。但我不断收到这个错误。

[L_PAYMENTREQUEST_0_NAME0] => Pacote de 150 créditos
[L_PAYMENTREQUEST_0_DESC0] => EF8D9B3E83
[L_PAYMENTREQUEST_0_QTY0] => 4
[L_PAYMENTREQUEST_0_AMT0] => 10.00
[L_PAYMENTREQUEST_0_TAXAMT0] => 2.30
[PAYMENTREQUEST_0_ITEMAMT] => 40.00
[PAYMENTINFO_0_TAXAMT] => 9.20
[PAYMENTREQUEST_0_AMT] => 49.20
[PAYMENTREQUEST_0_CURRENCYCODE] => USD
[PAYMENTREQUEST_0_PAYMENTACTION] => Sale
[RETURNURL] => http://localhost/www/kompite/compraCreditos.php
[CANCELURL] => http://localhost/www/kompite/pagamentoCancelado.php
[METHOD] => SetExpressCheckout
[VERSION] => 84
[NOSHIPPING] => 1

我无法找到我错误的地方。我得到的错误代码是10413