It's $32.15 cents. This is the answer because when you add 4,180 and 820 that equals 5,000. Since 1 kilogram equals 1,000 grams, that is 5 kilograms. Then you multiply $6.43 cents and 5 (because there are 5 kilograms) which equals 32. 15 cents. So, Norman spends $32.15 cents on shipping. I hope this helped. :)