Question 1003610
1 kilo = 1000 grams
1/5 kilo = 1/5 * 1000/1= 200 grams
3 kilos = 3000 grams
3000+200= 3200 grams
2150/3200= $0.67 per gram
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2/3 kilo = 2/3 * 1000/1= 666.67 grams
4kg * 1000= 4000 grams
4000+666.67= 4666.67 grams
2800/4666.67= $0.60
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The price difference:
0.67-0.60= 0.07 per gram
0.07 * 1000= $70 per kilo is the difference