Rounding up of service tax

Dear Friends,

I have a requirement with one of my customers to round up the service tax, ecess & Secess values in a contract and in subsequent billing document. Here, in the pricing procedure beside the service tax condition type as well as the Ecess & Secess condition types, i have assigned requirement13 & calculation type 17. In each of the condition type header also i have entered rounding up(A). In OB90 also i have assigned 100 against the company code and currency. Inspite of doing all these the system is still now not rounding up the values as desired. For example, 203.34 is converted to 203.00 & 203.54 is converted to 204.00. But my requirement is this that in both the cases system should round up only.

Please suggest if anything else is required to be done to achieve this.

Regards.