Suppose That at Time T (0 ≤ T ≤ 2 $1000 \mathrm { e } ^ { - 0.05t }$

Suppose that at time t (0 ≤ t ≤ 2 , t in months), the sales of a certain commodity are decreasing at a rate of $1000 \mathrm { e } ^ { - 0.05t }$ units per month. Calculate the total change in sales from t = 0 to t = 2.
Enter your answer as just a(1 - $\mathrm { e } ^ { \mathrm { b } }$ ) where b is a real number to one decimal place.