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The revenue generated from sales of a tablet changes at a rate given by R (t) = (2t + 4)(t2 + 4t) /3), where R (t) is measured in hundreds of thousands of dollars per year and t is measured in years since 1990. The cost to produce the same tablet changes according to C (t) = 20.3t, where C (t) is measured in hundreds of thousands of dollars and t is in years since 1990. Find the area between R (t) and C (t) from t = 6 to t = 8. (Round your answer to two decimal places) (10 points) Area = _