Gold coins for game money

I went in and tried to set up a agreement to trade gold coins for game money,it came back and said the minimum amount was'nt put in.i filled in the required fields with as follows
amount of gold coins to trade 2
minimumamount for gold coins 1,200.00B SC$
this amount would be 1,200,000,000.000
1.2T correct?
the fax says the gm is offerin 580.00B per gold coin and gamers @ 600.00B per gold coin and above, so i feel 600.00B per gold coin is a fair price.
am i doin something wrong?
your help would be appreciated,thx Ibrahim

Type it without the decimal and cents. So.....

1,200.00B SC$ = 1200000000

ok,thx