price – Currency convert for some products but not all products

I have 4 stores (2) Retail and 2 Wholesale.

I would like Product A to sell for :
-$100 US in International Retail store

  • $100 CA in Canadian Retail store
  • $50 US in International Wholesale store
  • $50 CA in Canadian Wholesale store

Product B and most of my other products
-$currency converted value US in International Retail store

  • $100 CA in Canadian Retail store
  • not for sale in International Wholesale store
  • not for sale in in Canadian Wholesale store

I have 90 products like product A and 1000 products like product B

Got any ideas ?

Mike