Can confirm all of the above.
The suggestion is you're paid per unit of £500, so £50,000 which is a very tasty offer. Reality is your time spent picking apples, shipping them down to the city to sell them at a disapointing price of £500 for 100 instead - so £5 per apple. Clearly not worth time and effort for £500.
The apples remain in your inventory so you can techically fulfil all the orders as you always have the apples.