Hi
Happy New Year.
Could anyone help me get the "number of orders" information (as seen when looking at admin - customers) printed on the invoices.

This would be very useful for packing order e.g.: if first order then include full brochure etc.

Ideal way would be a suffix to order number: e.g instead of 1234 it could be 1234-3 for third order from customer etc.

Thanks