The operation of Alfalah Builders consists of obtaining listings of houses being offered for sale by owners, advertising these houses, and showing them to prospective buyers. The company earns revenue in the form of commissions. The building and office equipment used in the business were acquired in Jan.1 of the current year and were immediately placed in use. Useful life of the building was estimated to be 30 years and that of the office equipment five years. The company closes its accounts monthly; on March 31st of the current year, the trial balance is as follows: Alfalah Builders Unadjusted Trial Balance March 31, 2008 Cash $ 9,750 Account receivable 7,500 Office Supplies.. 850 Land 30,000 Building 90,000 Accumulated depreciation: building $ 500 Office equipment 21,000 Accumulated depreciation: Office equipment 700 Accounts payable 14,750 Capital.... 136,650 Drawing. 4,500 CommissionEarned... 20000 Advertising Expense.. 900 Automobile Rental Expense.. 500 Salaries Expense 7,000 Telephone Expense 600 $172,600 $172,600 Instructions: a. Income statement b. Balance Sheet.