Purchase Orders - Amounts are not reflecting after "update" button pressed

Some detail - i enter the amounts under unit price and they all reflect correctly under amount and total. As soon as i press “update” the file saves and then the amounts disappear as per the uploaded example.

Your decimal separator seems to be comma, are you using comma or dot as your decimal separator when entering amounts?

Using dot. I will try with comma, thanks.

Such a silly thing, but thank you - this has sorted the issue out.