One item is omitted in each of the following summaries of balance sheet and income statement data for three different sole corporations, X, Y, and Z. Determine the amounts of the missing items, identifying each corporation by letter. 
Definitions:
Win-Win Bargaining
A negotiation strategy that aims for agreements where all parties benefit, often by seeking creative solutions that accommodate everyone's interests.
Mutual Gains Bargaining
A negotiation approach where all parties aim to achieve benefits and fulfill interests, promoting positive outcomes for all.
Distributive Bargaining
A negotiation strategy where two or more parties vie for the distribution of a fixed asset or resource, often resulting in a win-lose outcome.
Labor Unions
Organizations formed by workers to protect their collective interests, rights, and working conditions.
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