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Ulyses Connections allow us getting the costs of a reservation so clients can pay them upfront. To know the costs of a reservation we will need to retrieve a the array of proforma ands and, from here, we will determine the amount of the reservation. The amount As we explained here the number of proformas will depend primarily on the payment type selected in the reservation but also need to pay attention on the number of companies acting as "Bill to"'s in the reservation.