WordPress at a glance
filter is not described

woocommerce_order_formatted_line_subtotal filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_order_formatted_line_subtotal', 'filter_function_name_5320', 10, 3 );
function filter_function_name_5320( $subtotal, $item, $that ){
	// filter...

	return $subtotal;
}
$subtotal
-
$item
-
$that
-

Where the hook is called

WC_Abstract_Order::get_formatted_line_subtotal()
woocommerce_order_formatted_line_subtotal
woocommerce/includes/abstracts/abstract-wc-order.php 1900
return apply_filters( 'woocommerce_order_formatted_line_subtotal', $subtotal, $item, $this );

Where in WP core the hook is used WooCommerce

Usage not found.