Hi Jothikrishnan,
I would use the Integration Manager to import IV transactions into the target company. If the target didn't have those items, I would import those first. This is especially nice because you will be able to use the SQL tables of the originating company as your source. You won't have to mess around with Excel or .csv files or any of that. If the FIFO/LIFO layers are important you can also pull that information from the source company to keep your layers intact.
Kind regards,
Leslie