Answer the question on the basis of the following marginal utility data for products X and Y. Assume that the prices of X and Y are $4 and $2, respectively, and that the consumer's income is $18. 
What level of total utility will the utility-maximizing consumer realize?
Definitions:
Beginning Inventory
The value of inventory on hand at the start of an accounting period, before any purchases or production have occurred.
Sales
The total amount of a company's revenue generated from goods or services provided to customers.
Unearned Rent Revenue
Income received by a landlord for rent that has yet to be earned, typically relating to payment received in advance for future rental periods.
Service
A non-tangible good provided to consumers or businesses, such as consulting, banking, or cleaning, which can't be stored or physically possessed.
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