When I have a product in my cart. The 85.41€ the calculated payment fees are 2.81€ but its actually 2.65€ how displayed and also not updated in the sum
When I switch to PayPal it displays 2.75€ but in the price column the 2.91€ from the price without the coupon code
How can I change or fix this problem?
PayPal: 2.9% + 0.35 cent
Stripe: 2.9% + 0.25 cent
PayPal is the included payment delivered with Virtuemart
Stripe is a seperate installed plugin
I agree the calculations are weird. Thats what I also saw. The fees automaticly display if I use more then 1 payment system. So if I disable PayPal for example the fees display disappear. But the calculations are still the same as in the pictures shown.
The calculations are made by virtuemart. Pls dont ask me how the heck they do their calculations to display like that.
I dont use a checkout system. Just joomla, virtueamart and a template I bought.
If I refresh the site only the stripe amount is the same as shown under the logo but still wrong amount in the totals.
<?php
else {
// update cart objects
$coupon_taxbill = 0;
$this->vmcartPrices['couponTax'] = round( $coupon_session->product_discount_tax + $coupon_session->shipping_discount_tax + $coupon_taxbill,2 ) * $negative_multiplier;
$this->vmcartPrices['couponValue'] = round( $coupon_session->product_discount_notax + $coupon_session->shipping_discount_notax,2 ) * $negative_multiplier;
$this->vmcartPrices['salesPriceCoupon'] = round( $coupon_session->product_discount + $coupon_session->shipping_discount + $coupon_taxbill,2 ) * $negative_multiplier;
$this->vmcartPrices['billSub'] -= $this->vmcartPrices['couponValue'] * $negative_multiplier;
$this->vmcartPrices['billTaxAmount'] -= $this->vmcartPrices['couponTax'] * $negative_multiplier;
$this->vmcartPrices['billTotal'] -= $this->vmcartPrices['salesPriceCoupon'] * $negative_multiplier;
}
?>
<?php
// adjust for payment method
if ( ! empty( $this->vmcartPrices['salesPricePayment'] ) ) {
$percent_discount = $this->vmcartPrices['salesPriceCoupon'] / ( $this->vmcartPrices['salesPriceShipment'] + $this->vmcartPrices['withTax'] );
$payment_adjust = abs( round( $this->vmcartPrices['salesPricePayment'] * $percent_discount, 2 ) );
$this->vmcartPrices['billTotal'] -= $payment_adjust;
}
?>
<?php
// adjust for payment method
if ( ! empty( $this->vmcartPrices['salesPricePayment'] ) ) {
$orig_sales_price = $this->vmcartPrices['salesPricePayment'];
if ( ! class_exists( 'calculationHelper' ) ) {
require JPATH_VM_ADMINISTRATOR . '/helpers/calculationh.php';
}
$calculator = calculationHelper::getInstance();
$calculator->_cart = unserialize( serialize( $calculator->_cart ) ); // cannot use clone because it does not deep clone
if ( method_exists( $calculator, 'calculatePaymentPrice' ) ) {
$_new_cart_prices = version_compare( $this->vmversion, '2.9.8', '>=' ) ? $calculator->calculatePaymentPrice() : $calculator->calculatePaymentPrice( $this->o_cart, $obj->payment_id );
$this->vmcartPrices['billTotal'] -= ( $this->vmcartPrices['salesPricePayment'] - $_new_cart_prices['salesPricePayment'] );
}
}
?>
when I open the cart first time. its the 2.64. fees stays at 2.47
when i switch payment to stripe it shows the correct fees of 2.47 but switching back to paypal it shows 2.64 again.
Version 1 
The updated code had again 3 different effects. 3 different results. If I change the payment it stays at 2.64. Removing the coupon code fees r shown the right way.
Version 2 
So its something with the coupon code and the 1st payment. I changed the fees only to percentage. so its now 3% and not 2.9% + 0.35 cent
My Version: VirtueMart 3.8.4 10335