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When a tour operator is offered bonus tours - the reference must be the same on the booking
If two bookings with the same reference are created - the pricing will use the promotion and the booking will appear in the list of bookings that used the promotion
Note - when looking at a booking - to find other bookings with the same reference using
Which will put them into a stack on the same screen (see nav at bottom of screen)
Tour Promotions - Commissions
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