Solve the Problem $\sum _ { i = 1 } ^ { 9 } a _ { i }$

Multiple Choice

Solve the problem.
-The bar graph below shows a company's yearly profits from 1991 to 1999. Let an represent the company's profit, in millions, in year n, where n=1 corresponds to 1991, n = 2 corresponds to 1992, and so on.
Find $\sum _ { i = 1 } ^ { 9 } a _ { i }$

A) $\$ 631$ million
B) $\$ 593.4$ million
C) $\$ 140.1$ million
D) $\$ 650.8$ million