The information that you need is shown in the table.
Step 1 – calculate 2009’s total sales
312,500 + 396,700 + 546,300 + 595,500 + 529,000 = 2,380,000
Step 2 – calculate 2010’s total sales
278,500 + 470,400 + 502,000 + 643,100 + 506,000 = 2,400,000
Step 3 – calculate the % difference
2,400,000 / 2,380,000 = 1.0084 which is a 0.84% increase.
Thus the correct answer is (B), 0.84%