How to use a banana that helps save even more

I had a £1 voucher off if I spent more then £10 at Morrison’s local in Ilkley, these bottles of Cava were offered at a £4.99 saving £3 per bottle, took me to £9.98 so I got a 12pence banana, I felt I had to explain myself…

And so I get another voucher to save £1.30 if I spend £13 or more.