Find the error in the following incorrect calculation. 
Definitions:
Income Effect
The change in an individual's consumption pattern due to a change in their real income, usually following a change in prices.
Substitution Effect
The change in consumption patterns due to a shift in relative prices, leading consumers to replace more expensive items with cheaper alternatives.
Leisure
Free time spent away from business, work, and domestic chores, often used for relaxation, recreation, or hobbies.
Substitution Effect
The effect of a change in the price of a good or service on the demand for that good or service, due to consumers switching to or from substitutes.
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