Calculate totals (JS) rounding

admin/admin-init.php

@@ -95,6 +95,7 @@ function woocommerce_admin_scripts() {
 			'cart_total' 					=> __("Calculate totals based on order items, discount amount, and shipping? Note, you will need to calculate discounts before tax manually.", 'woothemes'),
 			'copy_billing' 					=> __("Copy billing information to shipping information? This will remove any currently entered shipping information.", 'woothemes'),
 			'prices_include_tax' 			=> get_option('woocommerce_prices_include_tax'),
+			'round_at_subtotal'				=> get_option( 'woocommerce_tax_round_at_subtotal' ),
 			'ID' 							=>  __('ID', 'woothemes'),
 			'item_name' 					=> __('Item Name', 'woothemes'),
 			'quantity' 						=> __('Quantity e.g. 2', 'woothemes'),

assets/js/admin/write-panels.js

@@ -80,7 +80,7 @@ jQuery( function($){
 					totalItemTax 		= 0;
 					
 					// Calculate tax and discounts
-					cart_discount = cart_discount + itemDiscount;
+					cart_discount = parseFloat( cart_discount + itemDiscount );
 
 					if (itemTax && itemTax>0) {
 						

classes/checkout.class.php

@@ -685,7 +685,7 @@ class woocommerce_checkout {
 					 		'cost' 			=> $_product->get_price_excluding_tax( false ),
 					 		'row_discount'	=> number_format( 
 					 			( ( $_product->get_price()-$woocommerce->cart->get_discounted_price( $values, $_product->get_price() ) ) * $values['quantity'] )
-					 			, 2, '.', '' ),
+					 			, 4, '.', '' ),
 					 		'taxrate' 		=> $rate,
 					 		'item_meta'		=> $item_meta->meta
 					 	), $values);