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Mathematics 20 Online
OpenStudy (silverlark2):

The mass ratio of nuts, chocolate chips and raisins in a fruit bar is 3:1:4. Nuts cost $5 per kg, $7.80 per kg and raisins cost $4.50 per kg. Calculate the selling price of a 50g fruit bar, correct to the nearest cent, if the manufacturer wants to earn 35 cents from each bar.

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