Answer:
$8000
Explanation:
The amount of the total operating expenses attributed to fuel before the increase in fuel price is: 30% of $400000. That is :
![0.3*$400000=$120000](https://img.qammunity.org/2020/formulas/mathematics/high-school/g6sx3khxbnenh9xof8tdg9fdqe2ruje5lo.png)
Now we need to find out what is the percent increase in fuel if it went from $1.50 to $1.60. We recall that to find the percent increase we need to perform the following calculation: (new price - original price)*100/original price
This gives us:
% and what in just ratio form is:
![(2)/(30)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/tb0vr37nkhsmwaibn7auc0pkruq72rn0.png)
Now, we can estimate how the $120000 fuel cost per year would be affected by such increase by multiplying the percent increase (in ratio form) we just estimated times this annual fuel cost:
Amount that will be added =
![(2)/(30) * $120000=$8000](https://img.qammunity.org/2020/formulas/mathematics/high-school/r4gzgcrkqoreejnp270mjljxspd1nmyjj7.png)