Unable to add costs of stock purchases

[David Ryder]

Hi,
A. I have read the pdf file and a lot of things on google but I just
can't get this to work - this is purely an example:
(Australian stock Exchange)
1. Create a Stock account for RIO - OK
2. BUY RIO 1000 @ $50.00 using Equity account - automatically calculates
$50,000 - OK
3. Brokerage - 375.00 	posted to Expsenses:Brokerage - causes Imbalance
4. GST - 37.50	posted to Expenses:GST - causes larger Imbalance.

These are just trying to enter stock before I start using gnucash for
daily transactions but every buy and sell needs to have brokerage and
GST.

I would like to ask two other questions concerning stocks in separate
posts - I hope the list will not mind. As a trader it is important to me
that I choose the right tools for my stock and options records.

Many thanks,
David