private PayPalPayment getStuffToBuy(string paymentIntent) {
//--- include an item list, payment amount details
PayPalItem[] items =
{
new PayPalItem("sample item #1", new Java.Lang.Integer(2), new BigDecimal("87.50"), "USD",
"sku-12345678"),
new PayPalItem("free sample item #2", new Java.Lang.Integer(1), new BigDecimal("0.00"),
"USD", "sku-zero-price"),
new PayPalItem("sample item #3 with a longer name", new Java.Lang.Integer(6), new BigDecimal("37.99"),
"USD", "sku-33333")
};
BigDecimal subtotal = PayPalItem.GetItemTotal(items);
BigDecimal shipping = new BigDecimal("7.21");
BigDecimal tax = new BigDecimal("4.67");
PayPalPaymentDetails paymentDetails = new PayPalPaymentDetails(shipping, subtotal, tax);
BigDecimal amount = subtotal.Add(shipping).Add(tax);
PayPalPayment payment = new PayPalPayment(amount, "USD", "sample item", paymentIntent);
payment.Items(items).PaymentDetails(paymentDetails);
//--- set other optional fields like invoice_number, custom field, and soft_descriptor
payment.Custom("This is text that will be associated with the payment that the app can use.");
return payment;
}