WooCommerce add a weight amount after the price such as 'per kg'

per-kg.php

<?php //<~ don't add me in

	
add_filter( 'woocommerce_get_price_html', 'wb_change_product_html' );
// Change and return $price_html variable using the $price and weight amount
function wb_change_product_html( $price ) {
	$price_html = '<span class="amount">' . $price . ' per kg </span>';	// change weight measurement here

	return $price_html;
}

add_filter( 'woocommerce_cart_item_price', 'wb_change_product_price_cart' );
// Change the cart prices with $price variable and weight amount
function wb_change_product_price_cart( $price ) {
	$price = $price . ' per kg';	// change weight measurement here

	return $price;
}

add_filter( 'woocommerce_checkout_cart_item_quantity', 'wb_checkout_review', 10, 3 );
// Change the checkput prices with $cart_item variable and weight amount
function wb_checkout_review ( $quantity, $cart_item, $cart_item_key ) {
	
	$cart_item = ' <strong class="product-quantity">' . sprintf( '&times; %s', $cart_item['quantity'] ) . ' kg </strong>';	// change weight measurement here

	return $cart_item;

}