diff --git a/src/10_PITF/Testat/BankAccount.cpp b/src/10_PITF/Testat/BankAccount.cpp
index ef311fb..c1a8ed7 100644
--- a/src/10_PITF/Testat/BankAccount.cpp
+++ b/src/10_PITF/Testat/BankAccount.cpp
@@ -21,10 +21,8 @@ BankAccount::BankAccount(BankAccount &bankAccount) : name(bankAccount.name) {
 }
 
 std::shared_ptr<BankAccount> BankAccount::operator+(std::shared_ptr<Bill> money) {
-    std::shared_ptr<Money> ptr = std::make_shared<Money>(new Money(money->getValue() + this->money->getValue(), money->getCurrency()));
-    std::cout << "Test" << std::endl;
 
-    BankAccount::money = ptr;
+    this->money->setValue(this->money->getValue() + money->getValue());
 
     return std::make_shared<BankAccount>(*this);
 }
@@ -37,12 +35,13 @@ std::shared_ptr<BankAccount> BankAccount::operator+(std::shared_ptr<Coin> money)
     return std::make_shared<BankAccount>(*this);
 }
 
-std::shared_ptr<Money> BankAccount::operator-(int value) {
+std::shared_ptr<Coin> BankAccount::operator-(int value) {
     auto * cashFactory = new CashFactory();
 
     return cashFactory->printCoin(value, CurrencyValue::USD);
 }
 
+
 bool BankAccount::operator<(std::shared_ptr<BankAccount> bankAccount) {
     return this->money->getValue() < bankAccount->money->getValue();
 }
diff --git a/src/10_PITF/Testat/BankAccount.h b/src/10_PITF/Testat/BankAccount.h
index d5f5b5a..b7d887a 100644
--- a/src/10_PITF/Testat/BankAccount.h
+++ b/src/10_PITF/Testat/BankAccount.h
@@ -17,7 +17,7 @@ public:
     BankAccount(BankAccount& bankAccount);
     std::shared_ptr<BankAccount> operator+(std::shared_ptr<Coin> money);
     std::shared_ptr<BankAccount> operator+(std::shared_ptr<Bill> money);
-    std::shared_ptr<Money> operator-(int value);
+    std::shared_ptr<Coin> operator-(int value);
     bool operator<(std::shared_ptr<BankAccount> bankAccount);
     std::string getName();
     std::shared_ptr<Person> getOwner();
diff --git a/src/10_PITF/Testat/Bill.cpp b/src/10_PITF/Testat/Bill.cpp
index 10fca77..c6d885f 100644
--- a/src/10_PITF/Testat/Bill.cpp
+++ b/src/10_PITF/Testat/Bill.cpp
@@ -10,6 +10,10 @@ Bill::Bill(Bill *bill) : Cash(bill->getValue(), bill->getCurrency()), serial(bil
 
 }
 
+Currency Bill::getCurrency() {
+    return Money::getCurrency();
+}
+
 int Bill::getValue() {
     return Money::getValue() * 10;
 }
diff --git a/src/10_PITF/Testat/Bill.h b/src/10_PITF/Testat/Bill.h
index 542888c..60a83e4 100644
--- a/src/10_PITF/Testat/Bill.h
+++ b/src/10_PITF/Testat/Bill.h
@@ -11,7 +11,8 @@ public:
     Bill(int value, Currency currency, std::string serial);
     explicit Bill(Bill *bill);
     std::string getSerial();
-    int getValue() override;
+    Currency getCurrency();
+    int getValue();
 };
 
 
diff --git a/src/10_PITF/Testat/Cash.h b/src/10_PITF/Testat/Cash.h
index cb4ddf5..7cc9587 100644
--- a/src/10_PITF/Testat/Cash.h
+++ b/src/10_PITF/Testat/Cash.h
@@ -1,7 +1,6 @@
 #ifndef C_C_CASH_H
 #define C_C_CASH_H
 
-#include <string>
 #include "Money.h"
 #include "HeapObject.h"
 
diff --git a/src/10_PITF/Testat/Coin.cpp b/src/10_PITF/Testat/Coin.cpp
index 685fb87..50da068 100644
--- a/src/10_PITF/Testat/Coin.cpp
+++ b/src/10_PITF/Testat/Coin.cpp
@@ -8,6 +8,10 @@ Coin::Coin(Coin *coin) : Cash(coin->getValue(), coin->getCurrency()) {
 
 }
 
+Currency Coin::getCurrency() {
+    return Money::getCurrency();
+}
+
 int Coin::getValue() {
     return Money::getValue();
 }
diff --git a/src/10_PITF/Testat/Coin.h b/src/10_PITF/Testat/Coin.h
index 65f71d1..5a61834 100644
--- a/src/10_PITF/Testat/Coin.h
+++ b/src/10_PITF/Testat/Coin.h
@@ -9,7 +9,8 @@ private:
 public:
     Coin(int value, Currency currency);
     explicit Coin(Coin *coin);
-    int getValue() override;
+    Currency getCurrency();
+    int getValue();
 };
 
 #endif
diff --git a/src/10_PITF/Testat/Money.cpp b/src/10_PITF/Testat/Money.cpp
index 3ee0f38..0775bfd 100644
--- a/src/10_PITF/Testat/Money.cpp
+++ b/src/10_PITF/Testat/Money.cpp
@@ -20,6 +20,18 @@ std::shared_ptr<Money> Money::operator+(Money &a) {
     }else return std::make_shared<Money>(Money(-1, Currency(CurrencyValue::USD)));
 }
 
+std::shared_ptr<Money> Money::operator+(Bill &a) {
+    if(currency == a.getCurrency()) {
+        return std::make_shared<Money>(Money(value + a.getValue(), CurrencyValue::USD));
+    }else return std::make_shared<Money>(Money(-1, Currency(CurrencyValue::USD)));
+}
+
+std::shared_ptr<Money> Money::operator+(Coin &a) {
+    if(currency == a.getCurrency()) {
+        return std::make_shared<Money>(Money(value + a.getValue(), CurrencyValue::USD));
+    }else return std::make_shared<Money>(Money(-1, Currency(CurrencyValue::USD)));
+}
+
 std::shared_ptr<Money> Money::operator-(Money &a) {
     if(currency == a.currency) {
         return std::make_unique<Money>(Money(value - a.value, CurrencyValue::USD));
@@ -40,6 +52,10 @@ int Money::getValue() {
     return value;
 }
 
+void Money::setValue(int value) {
+    this->value = value;
+}
+
 Currency Money::getCurrency() {
     return currency;
 }
diff --git a/src/10_PITF/Testat/Money.h b/src/10_PITF/Testat/Money.h
index 39a0629..4d583e3 100644
--- a/src/10_PITF/Testat/Money.h
+++ b/src/10_PITF/Testat/Money.h
@@ -4,6 +4,8 @@
 #include <memory>
 
 #include "Currency.h"
+#include "Bill.h"
+#include "Coin.h"
 
 class Money {
 private:
@@ -14,12 +16,15 @@ public:
     explicit Money(Money* money);
     std::shared_ptr<Money> operator=(Money money);
     std::shared_ptr<Money> operator+(Money &a);
+    std::shared_ptr<Money> operator+(Bill &a);
+    std::shared_ptr<Money> operator+(Coin &a);
     std::shared_ptr<Money> operator-(Money &a);
     const std::shared_ptr<Money> operator++(int);
     const std::shared_ptr<Money> operator--(int);
 
     virtual int getValue();
-    Currency getCurrency();
+    virtual void setValue(int value);
+    virtual Currency getCurrency();
 };
 
 #endif
diff --git a/src/10_PITF/Testat/main.cpp b/src/10_PITF/Testat/main.cpp
index fb29f5b..2776586 100644
--- a/src/10_PITF/Testat/main.cpp
+++ b/src/10_PITF/Testat/main.cpp
@@ -29,7 +29,7 @@ std::ostream &operator<<(std::ostream &os, std::shared_ptr<Bill> const& bill) {
     return os;
 }
 
-std::ostream &operator<<(std::ostream &os, std::shared_ptr<Cash> const& cash) {
+std::ostream &operator<<(std::ostream &os, std::shared_ptr<Coin> const& cash) {
     os << cash->getValue() << " " << cash->getCurrency();
     return os;
 }
@@ -56,6 +56,8 @@ CashFactory *cashFactory;
 void setup() {
     //FIXME: das hier könnte das Problem sein
     // http://www.cplusplus.com/forum/beginner/74320/
+    // Fehler könnte so gefunden werden:
+    // https://stackoverflow.com/a/6685693
 
     std::shared_ptr<Bank> bank1 = std::make_shared<Bank>(new Bank("Bank 1"));
     std::shared_ptr<Bank> bank2 = std::make_shared<Bank>(new Bank("Bank 2"));
@@ -102,9 +104,9 @@ void simulate() {
                     bankAccount->operator+(bill);
                 }
                 if (coin != nullptr) {
-                    bankAccount->operator+(coin);
+                    //bankAccount->operator+(coin);
                 }
-                std::shared_ptr<Money> fee = bankAccount->operator-(10);
+                //std::shared_ptr<Money> fee = bankAccount->operator-(10);
             }
             std::cout << "Test2" << std::endl;
             std::cout << bankAccount.get() << std::endl;