A TV station sells intervals of time for commercials of 10 seconds for $100, 20 seconds for
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Question:
A TV station sells intervals of time for commercials of 10 seconds for $100, 20 seconds for $180, and 40 seconds for $320. It has 2 minutes for publicity during a game with a total revenue of $1060 for six commercials shown. Find the number of commercials of each length sold by the TV station if there are twice as many 10 second commercials as 40 second commercials.
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