# maths

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Mandy can get 100kg of corn cob for \$160 from Matt,on condition that she buys at least 100kg.From another supplier,she can buy 100kg or less for \$1/cob,or more than 100kg for \$0.60/cob.she gets \$5/kg of con cobs or \$1.25 for an individual con cob.if she sell over 100kg today.what is the best profit per cob she can make? The answer is \$0.85,but I cannot work out,can someone please explain,thanks

• maths -

Hmmm. you are mixing up price per kg and per cob, with no indication of how many cobs per kg.

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