Invoice

Hi all,
i was wondering how can i create a invoice without specifying what the Unit Price is for an item. So, i just want to show all the items that the total amount invoice will include. not necessarily a price item for each product.
so, my invoice should have the following
2 x "product"
6 x "product"
3 x “product”

Total ZAR1200.00

Please help!!

You cannot generate a total without at least one unit price. You can enter whatever you want as a description.