Questions Updating Base Price based on previous margin

Hi All,

I have a client who would like to update their base price based on it's previous margin. Issue here is that when the item's cost price is updated through receipting or manual cost update we lose the last cost price and therefore the item's previous margin?

Questions:

1. Is the previous cost price recorded anywhere? 
2. If not is there anyway to record it somewhere?

We intend to use Velixo to calculate and then update the base price and then the Sell pricing 

this sound simple and I trust this makes sense.

Open for any ideas

cheers

Brendan