Total utility is calculated by summation of marginal utilities for each successive unit of the product that is consumed.
The total utility refers to aggregate level of satisfaction derived through the consumption of a product or service by the consumer.
Also, the Marginal utility refers to the level of satisfaction that the consumer derived from a product or service as a result on additional unit.
The formula for deriving the total utility is summation of marginal utilities for each successive unit of the product that is consumed.
Therefore, the Option C. is correct.
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