Data selection from "Valid from" & "Valid To" date

Dear BI Experts

I have a requirement in SAP BI.

I have data in BI Cube as show in attachment. Which is having Material, Valid from , Valid date and the Amount(Unit Price)

In BI Report user will enter one single date (i.e 27.05.2012) and the output should show amount 5.25 As seen in the attachment.

I mean to say that. If user execute the report by giving 27.05.2012. query should search in between 0VALIDFROM and 0VALIDTO for validity and display the result.

Note : user cant user.>= or <= conditions in scenario. If we use >=27.05.2012 then the result will show all the values which is greater than input date.

Your valuable input highly appreciated.