How to avoid rollups at parent level of hierarchy????

I jus need to show hierarchy i.e., Jan Feb Mar rolling up to Qtr 1.

Which I m able to do it, the problem which we are facing is while we push data in SSAS cube.

It roll up the value available in Jan Feb Mar to Qtr 1, even this right in case of absolute value. Even in case of percentage or average it is getting rolled up which is logical wrong.

Please we have cannot write calculation for average as the logic is bit complex.

Hope m able to explain the problem area.

Thanks in advance.