Y One item is omitted in each of the following summaries of balance sheet and income statement data for three different sole proprietorships, X, Y, and Z. Determine the amounts of the missing items, identifying each proprietorship by letter. Proprietorship Z Beginning of the Year: Assets $390,000 $150,000 $215,000 Liabilities 240,000 105,000 168,000 End of the Year: Assets 450,000 175,000 195,000 Liabilities 275,000 90,000 170,000 During the Year: Additional Investment by the owner 74,000 80,000 Withdrawals by the owner 95,000 83,000 Revenue ? 185,000 Expenses 160,000 113,000 175,000 195,000