To find the tax..you have to take the percentage from the car cost. In the cost, 5000,move the decimal left once to get 10%.
500= 10%
Now, you need the 7.5 left...
Move the decimal over twice to get 1%
50=1%
Now do 50 x 7 to get the 7%= which is 350
And now you need the last .5%, so divide 50 by 2.
You get 25= .5%
Now you add it up.
25+350=500= 875 Tax
So now you add the Tax and the car cost, which is B. $5,875