US Dollar to Indian Rupee conversion issue for assessable value on A/R Document

Hi All,

One of our customer having issues while calculation for US dollar to Indian rupee.

BP currency US Dollar,

System currency Indian Rupee.

Both currency set up as 2 decimal

SAP Version 9.0 PL 12

X item $ 2.71 price *  Today's US Dollar Rate 61.30 = 166.123 Assessable value (This is how system calculates)

166.123(Assessable value) * 1395.90(quantity) = 231891.10

Now customer wants assessable value must be 166.12 * 1395.90(quantity) = 231887

My question is how to tell system to check only 2 decimal while calculating today's dollar rate * unit price

I can create FMS to change assessable value but that will affect balance on Customers account.

Hope some one has solution for above problem.

Thanks,

Chintan