By volume, one alloy is %60 copper, %30 zinc, and %10 nickel. A second alloy has percents of %50, %30, and %20, respectively. A third alloy is %30 copper and %70 nickel. How much of each alloy is needed to make 100 cm3 of a resulting alloy with percents of %40, %15, and %45, respectively?

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