What was the value of the sales of Pioneer Computers in 1990?

(1) The sales of Pioneer Computers increased by $250,000 each year from 1980 - 1990
(2) The value of the sales of Pioneer Computers doubled between 1980 and 1990

(A) statement 1 alone is sufficient to answer the question, but statement 2 alone is not sufficient
(B) statement 2 alone is sufficient to answer the question, but statement 1 alone is not sufficient
(C) both statements together are needed to answer the question, but neither statement alone is sufficient
(D) either statement by itself is sufficient to answer the question
(E) not enough facts are given to answer the question



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I can say that both is needed to solve the question.
a- We can find how much the computer increased between 1980-1990 with the first statement.
b- As it is said in the second statement " the price is doubled between 1980-1990" we can find the exact price by removing the extra money.

Solving by numbers:
X--------------price of 1980
X+250---------price of 1981
X+500---------price of 1982
X+750---------price of 1983
X+1000--------price of 1984
X+1250--------price of 1985
X+1500--------price of 1986
X+1750--------price of 1987
X+2000--------price of 1988
X+2250--------price of 1989
X+2500--------price of 1990

Computer's price of 1980 is x
Computer's price of 1990 is x+2500
and X is half of X+2500... So X is 2500...

What was the value of the sales of Pioneer Computers in 1990?

(1) The sales of Pioneer Computers increased by $250,000 each year from 1980 - 1990
(2) The value of the sales of Pioneer Computers doubled between 1980 and 1990


1990-1980=10
10.250,000=2,500,000
1990==>x+2,500,000=2x
1990 fiatı 5,000,000

C:

X
X+250
X+500
X+750
X+1000
X+1250
X+1500
X+1750
X+2000
X+2250
X+2500

2x=x+2500
x=2500

5.ooo.ooo $
(C) both statements together are needed to answer the question, but neither statement alone is sufficient

very well indeed... thanks for your solutions..