Two extra zero in OrderDetail page

Hi,
I use NopCommerc 1.20

I add new currency and this format of number(1,200) is ok acording to this type of currency
the numbers are ok(without two zero) in everywhere in site except in OrderDetails page
In OrderDetails page after numbers of Order information (like Sub-Total, Shipping, Order Total) it puts two extra zero.
for example the Order Total must be 1,200 but it changes to 1,200.00
how can I remove last two zero.

thanks for your time and notice in advance