pewc_get_multicurrency_price.php

<?php
function pewc_get_multicurrency_price( $price, $item, $product ) {

	// Compatibility with WooCommerce multilingual
	$price = apply_filters( 'wcml_raw_price_amount', $price );

	if( class_exists('WOOCS') ) {
		global $WOOCS;
		if ($WOOCS->is_multiple_allowed) {
			$price = $WOOCS->woocs_exchange_value( floatval( $price ) );
		}
	}

	return $price;

}
add_filter( 'pewc_filter_field_price', 'pewc_get_multicurrency_price', 10, 3 );
add_filter( 'pewc_filter_option_price', 'pewc_get_multicurrency_price', 10, 3 );