A company has recently implemented a Unified Messaging (UM) system that integrates voicemail, email, and fax services into a single interface. The IT manager is tasked with ensuring that the voicemail system is configured to meet the needs of the organization. The manager decides to set up voicemail notifications to be sent to users via email. Each user should receive a notification for every voicemail left, and the system is expected to handle an average of 120 voicemails per day. If the average time taken to process each voicemail notification is 15 seconds, what is the total time in hours that the system will spend processing voicemail notifications in a week?