fix typo

Author: rolandlichters

Docs/UserGuide/tradedata/totalReturnSwap.tex

@@ -425,7 +425,7 @@ \subsubsection{Generic Total Return Swap / Contract for Difference (CFD)}
         <Trade>
           <TradeType>CommodityPosition</TradeType>
           <CommodityPositionData>
-            <!-- basket price = quantity x sum_i ( weight_i x commodityPrice_i x fx_i ) -->
+            <!-- basket price = quantity x sum_i ( weight_i x price_i x fx_i ) -->
             <Quantity>1000</Quantity>
             <Underlying>
               <Type>Commodity</Type>