'Invoice', 'number' => 'Invoice no.', 'date' => 'Date', 'due' => 'Due', 'customer_number' => 'Customer', 'customer_vat' => 'VAT ID', 'page' => 'Page', 'col_pos' => 'Pos', 'col_description' => 'Description', 'col_quantity' => 'Qty', 'col_unit_net' => 'Unit price net', 'col_total_net' => 'Total net', 'col_total_gross' => 'Total gross', 'discount' => 'Discount', 'surcharge' => 'Surcharge', 'col_unit_gross' => 'Unit price gross', 'subtotal' => 'Subtotal', 'adjustment' => 'Discount', 'net' => 'Net amount', 'tax' => 'VAT :rate %', 'gross' => 'Total', 'payment_title' => 'Payment terms', ];