Say I have three invoices with amount of Rs.500 each. So total amount will as Rs.1500. Now user would have received three invoice emails from me with invoice link. As for I know, user have to click invoice link in each invoice to pay Rs.500. User need to press link in each invoice to pay all invoice amount, means he/she needs to click and make payment 3 times. Instead of this, is there any way to get single payment as RS.1500 from any of the invoice link?