Day-to-day billing oversight

As full-time on-site event staff we are used to managing the day-to-day oversight of billing. Billing is freshest in your mind when reviewing every day, rather than receiving a 500-page bill 10 days post program. As an example, General Session was reset with bottled waters for the afternoon session, but only 250 seats of the 325 were used in the morning. That results in the savings of 75 bottled waters multiplied by $5.50++, which is roughly a savings of $520 on just that one event!