Answer:
1.99
Explanation:
Swiss chard: $0.49 per kg
Chinese lettuce: $0.52 per kg =
= 3 kg Swiss chard + 1 kg Chinese lettuce
= 3 kg * $0.49/kg + 1 kg * $0.52/kg
= $1.47 + $0.52
= $1.99
Answer: 1.99
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