Change Text XML port for Import Files

Hi, i have problem for import files from .csv to RTC, i’m using navision 2013

i want to change text from .csv to Navision when i already importing

Example : from .CSV

No, Type, Name

1, 3, , Cash

When import to nav, i want to change like this

1, Payment, Cash

Can someone help me?? i’m using codeunit, i’m new in navision 2013

thanks before