I've started using soundcloud at work to host audio content (interviews etc) that we can then embed on web pages. I want to upgrade to Pro as I've used all the free allowance. But my organisation prefers to pay for things via purchase orders/invoices if at all possible - we are only allowed to use credit cards if there is no possible alternative. Would it be possible to pay with this method – setting up soundcloud as a supplier on our system and then you sending us invoices that our finance department would then process - or are credit card/paypal the only options? Thanks.