SOLUTION: find the selling price per ounce of a face cream mixture made from 70 oz of face cream that costs $4 per oz, and 30 oz of face cream that costs $15 per ounce

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Question 1074195: find the selling price per ounce of a face cream mixture made from 70 oz of face cream that costs $4 per oz, and 30 oz of face cream that costs $15 per ounce
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
[ cost ] = [ cost/ounce ] x [ ounces ]
+70%2A4+=+280+
+30%2A15+=+450+
+280+%2B+450+=+730+
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The selling price is $730
+730%2F%28+70+%2B+30+%29+=+730%2F100+
+730%2F100+=+7.3+
The selling price per ounce is $7.30