Processing "How Did You Hear About Us?"

The following processing happens for the How Did You Hear About Us? data from TowerCoverage.

1. If the BillMax List TCHowDidYouHear2BXAdcode exists and a entry mapping the TowerCoverage value to an entry in the BillMax List adcodes by Item exists, the Account adcode will be set to the value from the adcodes List.
2. If the mapping does not exist, the TowerCoverage value will be added to the BillMax adcodes List and the Account adcode will be set to the value of the new entry.