The lame fox saw the old goat selling green onions, so he went over and asked, "Old goat, how much is this green onion?" * * * How many onions are there? "

The old goat said, "1 kg onion costs 1 yuan, * * * has 100 kg."

The lame fox rolled his eyes and asked, "How many onions and leaves are you?"

The old goat said impatiently, "One onion, white onion accounts for 20%, and the remaining 80% is onion leaves."

The lame fox broke his fingers and calculated, saying, "Onion, 1 catty, I'll give you 70 cents;" Onion leaves, 1 catty gives you thirty cents. 7 jiao plus 3 jiao is exactly equal to 1 yuan, ok? "

The old goat thought about it, thought what the fox said was reasonable, and promised to sell it to him. The fox smiled and began to count the money.

The fox first listed a formula: 0.7 × 20+0.3 × 80= 14+24=38 (yuan), and then said, "100 kg of green onions, of which 20% are green onions, that is, 20 kg, 1 kg of green onions is 70 points. Onion leaves account for 80%, that is, 80kg, 1kg, 30 points. The total is 24 yuan. Add it up to 38 yuan. Right? "

The old goat did not figure out the number for a long time, so he had to say, "You are right."

"I never cheat the fox! This is 38 yuan, count it! " The fox handed the money to the old goat. When the old goat came home from selling onions, he always felt that he had a little less money, but where was the money? I can't figure it out. He looked down and saw the little mole emerge from the ground. He asked the little mole to help him calculate an account.

The mole said, "You used to sell 1 kg of green onions 1 yuan. You have 100 kg, and you should sell it for 100 yuan. Why does the lame fox only give you 38 yuan? "

The old goat nodded and knew that he had suffered. But he didn't understand how he suffered.

The mole said, "The fox gave you 1 catty of onion 70 cents and 1 catty of onion leaves 30 cents, which makes it 2 jins 1 yuan. You have already lost half."

The old goat asked, "If I lose half my money, I should get 50 yuan. Why can I only take 38 yuan? "

Moore wrote a formula: (1-0.7) × 20+(1-0.3) × 80 = 6+56 = 62 (yuan). "You 1 kg onion suffers from 0.3 yuan, and 20 kg suffers from 6 yuan; 1kg Onion leaves suffer from 0.7 yuan and 80kg from 56 yuan. Together, it just sold 62 yuan less. "

The old goat turned and ran back. He saw the fox selling onions, 2 yuan per kilogram. Without saying anything, the old goat lowered his head, put his horn against the lame fox's lower back and pushed him into the pond.