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I will gladly appreciate if you help. Thank you very much.

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He plugs in the numbers in there and then he puts it into that equation you wrote.

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C stands for cost /concentration and A is for amount

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x can equal c*a
which is cost

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How do you know which box to plug in the numbers? Like which number goes to which box square?

maybe i am just guessing but you dont need the box
the box is just a visual aid.

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wel lI am more of a visual learner. :P XD

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I got 60 as well. XD But its asking the cost per oz of mixture. So is it just 60?

Or 10

60/6=10 :)

So then I am correct. XD

yes :)

or 2.48

idk tho not 100 sure

btw i am wrong on that last one

2.608695652 now i get

1/120+2/(4*a) = (20/100) is formula