The given bar graph represents the production and sales of a certain crop in quintals by the farmers F1, F2, F3 and F4.

What is the ratio between the total sales and total production by all farmers?

4 : 5

Total sale  :  Total production

( 410+500+430+620 )  :  ( 520+660+550+720 )

            1960               :             2450

               4                  :               5