The sale of electric fans on different days of a week is shown below. Observe the pictograph and answer the following questions.
If one fan was sold of ₹ 900. What was the total earnings on Friday?
A ₹ 6300
B ₹ 6500
C ₹ 18900
D ₹ 21000
i think the answer is a if not,please explain it to me