Na potrzeby artykułu: http://jaworowi.cz/woocommerce-usuniecie-ceny-wariantow-wyswietlanie-jednej-ceny-1279.php

WOO-SNIP-VAR-DEL

add_filter( 'woocommerce_variable_sale_price_html', 'wc_wc20_variation_price_format', 10, 2 );
add_filter( 'woocommerce_variable_price_html', 'wc_wc20_variation_price_format', 10, 2 );
function wc_wc20_variation_price_format( $price, $product ) {
    $prices = array( $product->get_variation_price( 'min', true ), $product->get_variation_price( 'max', true ) );
    $price = $prices[0] !== $prices[1] ? sprintf( __( '%1$s', 'woocommerce' ), wc_price( $prices[0] ) ) : wc_price( $prices[0] );
    // Sale Price
    $prices = array( $product->get_variation_regular_price( 'min', true ), $product->get_variation_regular_price( 'max', true ) );
    sort( $prices );
    $saleprice = $prices[0] !== $prices[1] ? sprintf( __( '%1$s', 'woocommerce' ), wc_price( $prices[0] ) ) : wc_price( $prices[0] );

    if ( $price !== $saleprice ) {
        $price = '<del>' . $saleprice . '</del> <ins>' . $price . '</ins>';
    }
    return $price;
}