need to append record while running report?

[mollie]

I'm reading a customer order file that lists items and quantities ordered.

Ex: Order # Item qty

1 15 1
2 18 2


However, now I have order # 3 with item 19, which actually consists of item 15 and 18, so I need to append them as item and quantity records.

so - my new file should read:

Ex: Order # Item qty

1 15 1
2 18 2
3 15 1
3 18 2


I'm lost - - - - any help would be appreciated.

Thanks-