Assertion: aluminum's price | /r/HasProperty | an equivalent of $12 per pound
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Source sentences:
text: In 1884, American architect William Frishmuth combined production of sodium, alumina, and aluminium into a single technological process; this contrasted with the previous need to collect sodium, which combusts in water and sometimes air; his aluminium production cost was about $16 per pound (compare to silver's cost of $19 per pound, or the French price, an equivalent of $12 per pound).