What's the best way to get a PDF customer order invoice with Shopify fees displayed for Xero?

[piersrr]

In order to reconcile orders in Xero, we need an invoice order PDF with the customer address, order details, fee details and then total amount paid into our bank. The money we get from Shopify is less than the amount on the order (because of fees) so the normal Order Printer invoice doesn't reconcile in Xero (we are using the free Shopify Order Printer app).

Has anyone had found a way to export a PDF invoice with order details plus Shopify fees, or know which liquid variable might be able to display that if I make a custom template in the Order Printer? Or am I approaching this wrong and missed an easier way?

[piersrr]

I've partially solved this by coping the default Order Printer template, and adding some rows to one of the tables. In the extra rows, I have been able to put a line for fees using the Shopify/PayPal formula, and then the total payout. 

For PayPal UK, this looks like:

Fees: {% order.total_price | times: 0.029 | plus: 30 | money %}