From the given question
There are given that the car dropped from $30,600 to $28,800.
Now,
First, find the absolute change;
Then,
From the formula of absolute change:

Where;
The ending quantity is $28800 and starting quantity is 30600.
Then,

And,
From the formula of relative change:

Then,

Hence, the value of absolute change is 1800 and the value of relative change is 0.0588.