I need the solution in details ( step by step) for each question

1 Joseph Jewelers purchased display shelves on March 1 for $36,000. If this asset has an estimated useful life of five years, what is the book value of the display shelves on April 302 a $600. b $34,800. ? $33,600. d $900. 2 The adjusting entry to recognize an unrecorded expense is necessary: When an expense is paid in advance. a b When an expense has been neither paid nor recorded as of the end of the accounting period. Whenever an expense remains unpaid at the end of an accounting period. d c Because the accountant is likely to forget to pay these unrecorded expenses. 3 Before any month-end adjustments are made, the profit of Lawrence Company is $550,000. However, the following adjustments are necessary: office supplies used, $35,000; services performed for clients but not yet recorded or collected, S12,300; interest accrued on note payable to bank, $14,100. After adjusting entries are made for the items listed above, Lawrence Company's profit would be: a $541,400. b $488,600. c $583,200. d $513,200