how to merge two crystal report

Question

i want to merge two crystal report  on basis of its field...

i have two views and create two crystal report 1 and report 2

report1 is create to use table itemMaster and CustomerInvDetails which have field Itemcode,itemdetails join with itemcode

report 2 is create  to use table  CustomerMaster and CustomerInvoice join with CustomerCode.....

how to merge these two reports....

i want my final report look like below

CustomerCode         CustomerName             TotalSale         Productname1.     productName2.......productname 25          Date

1001                          sam                                5455                y                              n                           y                   01/02/2005

...

..

..

..

these  fields come from    dbo.CustomerMaster.CustomerCode   ,   dbo.CustomerMaster.CustomerName,

dbo.CustomerInvoice.TotalSales   ,dbo.ItemMaster.ProductDescription(ProductName) ,dbo.customerInvoice.Date

how can i make above report...

please help me 

its urgent.....