1) Omnipay doesn't accept decimals with more than a precision of 2.
2) Once order is created organiser_booking_fee is the correct value to use else use total_booking_fee
3) Controller makes use of OrderService instead of Order Model
1) Surfaced more logic from from views into service.
2) If charge_tax is set in database tax is charged.
3) Made the name of the Order service OrderService so its not confused with the Order Eloquent Model.
4) Move order totalling logic in to Service and call service where necessary.