Complete the following reaction sequence,giving details of all significant intermediates. 
Definitions:
Utility Function
A mathematical representation of a consumer's preference ranking for bundles of goods or services measured in terms of utility.
Consumer's Surplus
The disparity between the amount customers are prepared to spend on a product or service and the actual price they pay.
Earplugs
A device inserted in the ear canal to protect the ears from loud noises, water, or foreign bodies.
Utility Function
A mathematical representation of a consumer's preference orderings over a set of goods and services.
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