The amount contributed by Harper is equal to $12600 and the interest is equal to $159963.16.
People often save money for future by making investments in the form of deposits in banks. The banks give some amount of interest on the deposited amount which are the extra amount earned as profit. Harper also saves money for retirement and deposits $350 each month for 30 years. Now to find the amount contributed by Harper we multiply per month amount to number of years and months that is
Amount contributed = $350 × 30 × 12
Amount contributed = $126000
Now we find the interest earned by Harper as
Interest amount = Amount in bank - Amount contributed
Interest amount = $285963.16 - $126000
Interest amount = $159963.16
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