woothemes / woocommerce

				$item_taxes = WC_Tax::calc_shipping_tax( $amount, WC_Tax::get_shipping_tax_rates( $cart[ $cost_key ]['data']->get_tax_class() ) );

				// Sum the item taxes

				foreach ( array_keys( $taxes + $item_taxes ) as $key ) {

					$taxes[ $key ] = ( isset( $item_taxes[ $key ] ) ? $item_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );

				}

			}

			// Add any cost for the order - order costs are in the key 'order'

				$item_taxes = WC_Tax::calc_shipping_tax( $costs['order'], WC_Tax::get_shipping_tax_rates() );

				// Sum the item taxes

				foreach ( array_keys( $taxes + $item_taxes ) as $key ) {

					$taxes[ $key ] = ( isset( $item_taxes[ $key ] ) ? $item_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );

				}

			}

		}

				wc_update_order_item_meta( $item_id, '_line_tax_data', array( 'total' => $line_taxes, 'subtotal' => $line_subtotal_taxes ) );

				// Sum the item taxes

				foreach ( array_keys( $taxes + $line_taxes ) as $key ) {

					$taxes[ $key ] = ( isset( $line_taxes[ $key ] ) ? $line_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );

				}

			}

		}

			wc_update_order_item_meta( $item_id, '_line_tax_data', array( 'total' => $line_taxes ) );

			// Sum the item taxes

			foreach ( array_keys( $shipping_taxes + $line_taxes ) as $key ) {

				$shipping_taxes[ $key ] = ( isset( $line_taxes[ $key ] ) ? $line_taxes[ $key ] : 0 ) + ( isset( $shipping_taxes[ $key ] ) ? $shipping_taxes[ $key ] : 0 );

			}

		}

		// Save tax totals

		$this->remove_order_items( 'tax' );

		// Now merge to keep tax rows

		foreach ( array_keys( $taxes + $shipping_taxes ) as $tax_rate_id ) {

			$this->add_tax( $tax_rate_id, isset( $taxes[ $tax_rate_id ] ) ? $taxes[ $tax_rate_id ] : 0, isset( $shipping_taxes[ $tax_rate_id ] ) ? $shipping_taxes[ $tax_rate_id ] : 0 );

		}

		return true;

	}

						}

						// Sum the item taxes

						foreach ( array_keys( $taxes + $line_taxes ) as $key ) {

							$taxes[ $key ] = ( isset( $line_taxes[ $key ] ) ? $line_taxes[ $key ] : 0 ) + ( isset( $taxes[ $key ] ) ? $taxes[ $key ] : 0 );

						}

					}

				}

			}