Study the given graph and answer the question that follows.

The ratio of the total number of computers of type A sold in February, April and June to the total number of computers of type B sold in April and May is:

16 : 15

Total number of computers of type A sold in February, April and June  :   Total number of computers of type B sold in April and May

(180 + 275 + 345 )  :   ( 325 +  425 )

         800               :        750

          16                :          15