Input (grade 9): In Western countries, the average retail price is $1,000 \/O/ Â # 500 \/O/ â 700 per pound (US$ 2,200 \/O/ Â # 1,100 \/O/ â 1,550 per kilogram).
Output (grade 9): In Western countries, the average retail price is $1,000 \/O/ Â # 500 \/O/ â 700 per pound (US$ 2200 \/O/ Â # 1100 \/O/ â 1550 per kilogram).