Pricing doubt

My current system configuration

PR00 = Base Price = 3.64(Commercial rounding in condition type)

Quantity in Sales Order = 50

So condiiton value = 50 * 3.64 = $182

Plus Tax = MWST (say at 10%) = 18.20

Total selling price = $200.20

But from the customer point of view they are buying 50 tickets at $4.00 each = $200,the total price is actually $200.

What we need to be able to do is enter a base price of $3.636363 so we get:

50 * $3.636363 = $181.82

Plus tax at 10% = $18.18

Total selling price = $200 and not $200.20

I checked and came to know that standard SAP allows the values upto 2 decimal places (both KWERT-Condition value and KBETR-Amount/Condition rate ).

Then how can we achieve this?