Answer:
6400 
Explanation:
We have to calculate how much it grows monthly, they tell us that 800 per year, a year has 12 months, we calculate like this: 
 800/12 = 66.66 would be the value per month 
how are 96 months, the growth would be: 
66.66 * 96 = 6400 
Which means that the growth would be 6,400 in that 96-month time.