If the price of meat per kg is 60 lower, Bobby can purchase 6 kg more for a certain amount. If the price of meat per kg is 100 les

If the price of meat per kg is 60 lower, Bobby can purchase 6 kg more for a certain amount. If the price of meat per kg is 100 less, he can purchase 12 kg more for the same amount. Find the actual cost of 15kg of meat?​

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