Capturing old Price

we have table in ECC where we have Prices based on Customer and material (millions of records). This table table maintains just latest price.

ECC

Say the price changes for customer/material (1000, Advil), from 5.95 to 6 on 05/05/2015. In BW I need to capture both 5.95 and 6. along with Price change date

I will need to have BW table like this

Any idea on above logic is appreciated

Thanks,

Vinay