Price Change in SA / PO

Hello All,

We are having business scenario where the Price change is happening in PO / SA, but the business requirement is that the price should be driven while GR / IV based on the invoice date. example

Current Price - 100 upto 31.03.15

New Price - 110 from 01.04.15

Now the requirement is that if we do MIGO on invoice date pertaining to on or before 31.03.15, the price should be considered as 100 and if, the invoice date is as or after 01.04.15 the rate should be 110.

Please suggest in both cases - SA as well as PO.

Regards,

Pranav