Multiply the number of grapefruits by the average mass, then convert to kg and g.<br><br>
&bull; Total mass = 70 × 235 = 16,450 g<br>
&bull; Convert to kg: 16,450 ÷ 1000 = 16.45 kg<br>
&bull; 16.45 kg = 16 kg and 0.45 × 1000 = 450 g<br>
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Final Answer: 16 kg 450 g