Biscuits as bribery, not payment, I reckon.
In my line of work we come across a few second hand machinery dealers, one (who was a bit of a “rogue”, in fact, he was a stingy, conniving tw@ who’d of sold his mum to get a deal) once asked my uncle to clean up a machine for him that he was selling and said “I’ll sort you out” (This was taken as he would be paying him for the work). My uncle spent half a day vacuuming the sawdust out and giving it a good spit and polish. The dealer gave him a £1 pork pie from the local butchers.
My uncle gave him it back, at high velocity, in the back of the head.