Task: Question Answering
Input (English): Problem: a car is purchased on hire - purchase . the cash price is $ 21 000 and the terms are a deposit of 10 % of the price , then the balance to be paid off over 60 equal monthly instalments . interest is charged at 12 % p . a . what is the monthly instalment ? 
Options: a ) $ 503 , b ) $ 504 , c ) $ 505 , d ) $ 506 , e ) $ 507
Output (English): b