Mr. Olaffsen opened a sandwich shop and a smoothie stand in his neighborhood. The following table and equation show function f, representing Mr. Olaffsen's profit, in dollars, x months since opening the sandwich shop.

x1234567
f(x)12,00015,50018,00019,50020,0001 9,50018,000

The following table and equation show function g, representing Mr. Olaffsen's profit, in dollars, x months since opening the smoothie stand.

x1234567
g(x)9,30012,00014,10015,60016,50016 ,80016,500

Select the true statement.

A.
The difference between the maximum profit earned by the sandwich shop and the smoothie stand is $3,200.
B.
The difference between the maximum profit earned by the sandwich shop and the smoothie stand is $3,500.
C.
The difference between the maximum profit earned by the sandwich shop and the smoothie stand is $3,000.
D.
The difference between the maximum profit earned by the sandwich shop and the smoothie stand is $2,700.