diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/20200317.csv b/CM2005 Object Oriented Programming/Topic 5/5.3.5/20200317.csv
index 3752ce3..44be9b5 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.3.5/20200317.csv	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.3.5/20200317.csv	
@@ -1,4 +1,4 @@
-2020/03/17 17:01:24.884492,ETH/BTC,bid,0.021873a78,a.44564869
+2020/03/17 17:01:24.884492,ETH/BTC,bid,0.02187a78,2.44564869
 2020/03/17 17:01:24.884492,ETH/BTC,bid,0.02187308,7.44564869
 2020/03/17 17:01:24.884492,ETH/BTC,bid,0.02187307,3.467434
 2020/03/17 17:01:24.884492,ETH/BTC,bid,0.02187305,6.85567013
@@ -202,11 +202,7 @@
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5323.83418,0.001
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5323.25277012,1.97008162
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5321.,3.35
-
-
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5319.450228,0.00020075
-
-
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5315.6477491,0.00027634
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5315.22320561,0.0064523
 2020/03/17 17:01:24.884492,BTC/USDT,bid,5314.15443661,0.000268
@@ -265,11 +261,7 @@
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5396.42871506,14.1318
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5400.,0.14371419
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5400.33151632,0.0384
-
-
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5405.41766912,0.69895055
-
-
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5405.41766915,0.00423615
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5406.30673519,0.01366
 2020/03/17 17:01:24.884492,BTC/USDT,ask,5406.52042159,2.92760636
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/MerkelMain.cpp b/CM2005 Object Oriented Programming/Topic 5/5.3.5/MerkelMain.cpp
index c024c54..79e1894 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.3.5/MerkelMain.cpp	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.3.5/MerkelMain.cpp	
@@ -159,6 +159,10 @@ void MerkelMain::gotoNextTimeframe()
         for (OrderBookEntry& sale : sales)
         {
             std::cout << "Sale price: " << sale.price << " amount " << sale.amount << std::endl; 
+            if(sale.username == "simuser")
+            {
+                wallet.processSale(sale);
+            }
         }
     }
     currentTime = orderBook.getNextTime(currentTime);
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/OrderBook.cpp b/CM2005 Object Oriented Programming/Topic 5/5.3.5/OrderBook.cpp
index 9102b77..40db8cc 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.3.5/OrderBook.cpp	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.3.5/OrderBook.cpp	
@@ -133,7 +133,7 @@ std::vector<OrderBookEntry> OrderBook::matchAsksToBids(std::string product, std:
     //         if bid.price >= ask.price # we have a match
             if (bid.price >= ask.price)
             {
-                std::cout << "bid price is right " << std::endl;
+                //std::cout << "bid price is right " << std::endl;
                 OrderBookEntry sale{ask.price, 0, timestamp, product, OrderBookType::asksale};
                 OrderBookType type = OrderBookType::asksale;
                 if(bid.username == "simuser")
@@ -183,7 +183,7 @@ std::vector<OrderBookEntry> OrderBook::matchAsksToBids(std::string product, std:
 
 
     //             if bid.amount < ask.amount # bid is completely gone, slice the ask
-                if (bid.amount < ask.amount)
+                if (bid.amount < ask.amount && bid.amount != 0)
                 {
     //                 sale.amount = bid.amount
                     sale.amount = bid.amount;
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.cpp b/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.cpp
index b4addab..0b12e28 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.cpp	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.cpp	
@@ -89,4 +89,30 @@ bool Wallet::canFulfillOrder(OrderBookEntry order)
     return containsCurrency(currency, amount);
   }
   return false;
+}
+
+void Wallet::processSale(OrderBookEntry& sale)
+{
+  std::vector<std::string> currs = CSVReader::tokenise(sale.product, '/');
+  // ask
+  if(sale.orderType == OrderBookType::asksale)
+  {
+    double outAmount = sale.amount;
+    std::string outCurrency = currs[0];
+    double incAmount = sale.amount * sale.price;
+    std::string incCurrency = currs[1];
+
+    currencies[incCurrency] += incAmount;
+    currencies[outCurrency] -= outAmount;
+  }
+  if(sale.orderType == OrderBookType::bidsale)
+  {
+    double incAmount = sale.amount;
+    std::string incCurrency = currs[0];
+    double outAmount = sale.amount * sale.price;
+    std::string outCurrency = currs[1];
+
+    currencies[incCurrency] += incAmount;
+    currencies[outCurrency] -= outAmount;
+  }
 }
\ No newline at end of file
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.h b/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.h
index 57776f8..cbdf18c 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.h	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.3.5/Wallet.h	
@@ -20,6 +20,9 @@ class Wallet
     /** check if the wallet can cope with the ask or bid */
     bool canFulfillOrder(OrderBookEntry order);
 
+    /** update the contents of the wallet * assumes the order was amade by the owner of the wallet */
+    void processSale(OrderBookEntry& sale);
+
     /** generate a string representation of the wallet */
     std::string toString();
 
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.3.5/a.exe b/CM2005 Object Oriented Programming/Topic 5/5.3.5/a.exe
index 384aa2d..f30c0d8 100644
Binary files a/CM2005 Object Oriented Programming/Topic 5/5.3.5/a.exe and b/CM2005 Object Oriented Programming/Topic 5/5.3.5/a.exe differ