Numerical problem

Ahmed shoaib started buisness on 1at jan.2010 and his transaction are as follows 
2010
jan 1          started buisness for cash          rs 500,000
      3         purchased building for cash       rs 300,000
      6         purchased goods for ali              rs 50,000
      10       sold goods to amjid                      rs 10,000
      13       sold goods for cash                     rs 5000
     15       cash paid to creditor                    rs 20,000
      31     cash received from debtors         rs  7500