Mum: I’ll give you $2 to read one French book
Oliver: no
Mum: $2!!!!
Oliver: no
Mum: ok $5 for 5 French books
Oliver: no
Mum: ok! $1 for an English book
Oliver: no … how about $5 for one English book
Mum: $5!!!! wow, that did not go the way I thought it would