Study the bar chart and answer the questions.
Sale of Cellular Phones
The difference in the sales of cellular phones for the years 1997 and 1999 is ?
A.
500 units
B.
1,000 units
C.
5,000 units
D.
18,000 units
Correct answer is D
The required answer is got by 48,000 - 30,000 = 18,000.