The manager of the main laboratory facility at CitiFit Center is interested in being able to predict the overhead costs each month for the lab. The manager believes that total overhead varies with the number of lab tests performed but that some costs remain the same each month regardless of the number of lab tests performed. The lab manager collected the following data for the first seven months of the year.

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Use the$$ high$-$low method to determine the$$ laboratory's cost equation for total laboratory overhead. Use your results to predict total laboratory overhead if $2,900$ lab tests are performed next month.