Letter of Credit Forum

Pls. clarify the following:

In an L/c , we are shipping goods partially and when we make an invoice for the goods shipped, the value per unit works out in fractions like 6780.1666, how can we write in the invoice, can we round it off ? If we round it off, the L/c might result in discrepancy saying that we are claiming more and if we claim less too, it might result in L/c discrepancy, kindly clarify this.