Answer: 21 books
Explanation:
I am estimating $32.50 to $33.
Remaining amount= 204 - 33 = $171
$8.15 = $8
$171 รท $8 = 21.375
Estimated answer = 21 books.
By reading the question it feels like there are options to choose from for the final answer. If it is, then choose the one which seems as close as possible to what I have got above.
Hope this helps :)