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Aunt Wang talks about fund video
Let corn be 1 yuan 1 kg, and apple be 1/0.8= 1.25 yuan.

Let the skin weight be a, if the weight of corn is 1- A Jin and the value is1-a yuan, the actual weight of apple is 0.8-a, and the value is (0.8-a) ×1.25 =1-1.