public static BigDecimal currencyConverter(Map<String, List<BigDecimal>> data, Map<String, BigDecimal> currencyToEurRate) {
        BigDecimal bigPpResult = BigDecimal.valueOf(0);
        for (String currency : data.keySet()) {
            for (BigDecimal value : data.get(currency)) {
                bigPpResult.add(value.multiply(currencyToEurRate.get(currency)));
            }
        }
        return bigPpResult;
    }