bekarice

<?php
// only copy the opening php tag if needed
// Change the shop / product prices if a unit_price is set
function sv_change_product_html( $price_html, $product ) {

	$unit_price = get_post_meta( $product->id, 'unit_price', true );

	if ( ! empty( $unit_price ) ) {
		$price_html = '<span class="amount">' . wc_price( $unit_price ) . ' per kg</span>';	
	}