Question
One durian cost 4 times as much as one starfruit. Mrs Zhang bought 4 durians and 3 starfruits for $19.20. How much would 7 durians and 8 starfruits cost? Express the answers to 2 decimal places.
3 m

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One durian cost 4 times as much as one starfruit. Mrs Zhang bought 4 durians and 3 starfruits for $19.20. How much would 7 durians and 8 starfruits cost? Express the answers to 2 decimal places.