If media vehicle #1 has a Reach of 77.7% and media vehicle #2 has a Reach of 55.6% within a market with a Target Demo Population of 486,500, what are the Gross Impressions which may include audience duplication?
a) Gross Impressions = 326,197
b) Gross Impressions = 648,504
c) Gross Impressions = 600,500
d) Gross Impressions = 362,000