Answer the Following Questions.(Show Your Work.)

Essay

Answer the following questions.(Show your work.)
a.A machine was purchased on July 1,2012.It had a cost of $72,000 and an estimated useful life of nine years with zero value at that time.What is the machine's carrying value after four years?
b.On April 1,2012,a company paid in advance $108,000 for three years' insurance.How much Prepaid Insurance remains on the balance sheet on December 31,2012?
c.A company began the year with $1,600 in supplies,purchased $4,000 in supplies,and ended the period with $1,200 in supplies.How much is Supplies Expense for the period?
d.A company was paid $3,600 in advance for services to be performed.At year end,one-third had not yet been earned.How much in Service Revenue should be recorded?