def shipping_invoice_ready(invoice)      
      @invoice = invoice
      sc = invoice.site.store_config
      mail(:to => sc.shipping_email, :subject => 'Order ready for shipping')
    end
def shipping_invoice_ready(invoice)      
      @invoice = invoice
      sc = invoice.site.store_config
      mail(:to => sc.shipping_email, :subject => 'Order ready for shipping')
    end
Sends a notification email to the shipping dept that an invoice is ready to be shipped