I need to keep a summary of our latest prices plus the previous price ,
so on sheet1 cell C5 is the previous price while cell D5 is the current
price.

I want these prices to update automatically whenever a price change
occures. Each time a price change occures the new price is added to row
16, currently the last price is X16 while the previous price is W16.

How do I get cell D5 to lookup the last item in row 16 and C5 to find
the last but one item in row 16.

With thanks

Bob