public void ThenUserCalculateDataFromMultipleProducts() { double yourPricesSum = basketP.GetYourPricesSumCheckCurrency(); Assert.AreEqual("£" + /*Math.Round(yourPricesSum, 2)*/ yourPricesSum.ToString("N2").Replace(",", ""), basketP.GetTotalPriceValue()); string diff = /*Math.Round*/ (basketP.GetTotalPricesSumCheckCurrency() - yourPricesSum).ToString("N2").Replace(",", "");//.ToString("N2").Replace(",", ""); Assert.AreEqual("£" + diff, basketP.GetTotalSaving()); }