Gina Rolande sells memberships to the symphony in Winnipeg. The symphony's procedure requires Rolande to write a patron receipt for all memberships sold. The receipt forms are pre-numbered. Rolande is having personal financial problems, and she stole $500 received from a member. To hide her theft, Rolande destroys the symphony copy of the receipt she gave the member. What will alert manager Tom Jelnick that something is wrong?