The given bar graph shows the sales of cars from six branches of a dealer B1 , B2 , B3, B4 ,B5,B6, during two consecutive years and 2018 and 2019 .Blue colour corresponds to the year 2018 and red colour corresponds to the year 2019 .

The average sale of cars (from all branches ) for the year 2018 is :

Options

A. 80
B. 90
C. 78
D. 85