referralFeeCost =
                buyerFeeTotal -
                (baseAmount * bfee * IMarketplaceSetting(marketplaceSetting).referralFee()) /
                (BASE * BASE);
referralFeeCost = 25e6 - (1000e6 * 250 * 1000) / (10000 * 10000)
                = 25e6 - 2.5e6 
                = 22.5e6
referralFeeCost =
-                buyerFeeTotal -
-               (baseAmount * bfee * IMarketplaceSetting(marketplaceSetting).referralFee()) /
-               (BASE * BASE);
+               buyerFeeTotal * IMarketplaceSetting(marketplaceSetting).referralFee() / BASE
