For the time being there is a transaction fee on all orders. It’s the cost of using the online payment gateway, which online shops normally hide in their prices. BU are instead highlighting this charge so you can make an informed choice as to use the shop or pay BU with more conventional means. For BU to go online; it significantly reduce the club’s workload and hopefully, for you, the convenience of buying online is worthwhile.
If you want to make the most out of the shop financially then know the rates are 1.4% + 20p per order. If you buy three things don’t make three orders otherwise you’ll be paying that 20p three times.