>>I want to create a line graph that shows each Clients (A,B,D,E) ' price changes Over Years (year 1, year 2,year 3)
Do you want to chart the PRICES, or the PRICE CHANGES?
That is, for Client A, would you expect to 10, 20, 30 (the prices), or <nothing>, 10, 10 (the changes in price vs previous year)?