Mavis stopped at a roadside farm shop to buy eggs.
The shop had no cashier, only shelves, a price list, and a wooden honesty box.
A sign read:
EGGS £3
POTATOES £2 A BAG
HONEY £5
PLEASE TAKE CORRECT CHANGE FROM THE RED TIN.
Mavis had a ten-pound note.
She placed it in the honesty box and opened the red tin.
Inside were three coins, four buttons, and a handwritten voucher:
ONE FREE BAG OF POTATOES — VALUE £2.
She needed seven pounds change.
The available money totaled one pound twenty.
Mavis took the voucher, one bag of potatoes, and the coins.
She still lacked three pounds eighty.
Her husband, Arthur, waited in the car.
“Take another bag.”
“That is not change. That is vegetables.”
“At two pounds a bag, vegetables are legal tender here.”
Mavis took a second bag and left twenty pence in the tin to balance the calculation.
As she reached the car, a farmer named Tom appeared.
“You bought a lot of potatoes.”
“I bought eggs. The potatoes are change.”
Tom checked the tin.
The voucher was not currency. It was a prize from last summer’s village raffle.
Mavis showed him the sign.
It clearly said TAKE CORRECT CHANGE FROM THE RED TIN.
“The tin contained potatoes.”
“The potatoes were on the shelf.”
“The voucher was in the tin.”
Tom admitted the system was confusing.
He offered four pounds in coins if Mavis returned one bag.
She did.
Now she had paid ten pounds, taken eggs worth three, potatoes worth two, received five pounds in coins, and left twenty pence in the tin.
Arthur calculated they had overpaid by twenty pence.
Tom returned twenty pence.
Everyone was satisfied.
Then another customer arrived with a twenty-pound note and bought honey.
The red tin now held almost no coins.
Tom asked Mavis whether she could change the note.
She had five pounds.
Arthur had a ten and two ones.
Between them, they made fifteen pounds change.
The customer left.
Tom owed Mavis and Arthur fifteen pounds from the honesty box.
He had only the twenty-pound note.
Arthur suggested buying more produce.
They took honey, eggs, and another bag of potatoes worth ten pounds.
Tom gave them the remaining five-pound note from his wallet.
Then he realized the honey jar was a display jar filled with dried beans.
Mavis returned it.
Tom owed five pounds again.
He offered a real jar of honey.
Arthur said they no longer wanted honey because it had become accounting.
A queue formed.
Each customer had a large note.
Tom began using eggs as one-pound units, potatoes as two-pound units, and honey as five.
A woman received change of one honey and two eggs.
A man paid for potatoes with six eggs he had just been given.
By lunchtime, produce moved between customers without leaving the car park.
Tom’s wife arrived and asked what was happening.
“Honesty,” said Tom, “with insufficient coins.”
She opened a locked drawer beneath the counter.
Inside was a cash float containing sixty pounds in change.
Tom had forgotten the key was in his pocket.
He paid everyone correctly.
Mavis returned the extra produce and kept her original eggs and one potato bag.
At home, Arthur unpacked the car.
They had somehow acquired four buttons and the old voucher.
Mavis had scooped them up with the coins.
The voucher said ONE FREE BAG OF POTATOES.
Arthur smiled.
“We can go back tomorrow.”
Mavis tore it in half.
“The potatoes were fine.”
“What was wrong?”
“They were worth two pounds when we took them, five pounds when we returned them, and fifteen pounds while you were explaining them.”
Arthur held up an egg.
“At least this stayed three pounds.”
One egg cracked in his hand.
Mavis looked at the mess.
“Not anymore.”
The honesty box had accepted money, produce, vouchers, buttons, and trust.
The only thing nobody could make change for was common sense.